Great White: LongevityWe would like to show you a description here but the site won’t allow us. 9. Size: Length: up to 12 ft; Weight: up to 460 lbs. 2. With a sizeable protruding nose and sharp jaw, the Goblin Shark hunts for prey in the ocean’s inky depths. Science Reporter. However that is not true as there are sharks living in warm, temperate and cold waters. . The upper jaw has between 35 and 53 long, narrow, needle-like teeth and the lower has 31 and 62 teeth with three rows of anterior teeth on. The Goblin Shark mostly feeds on fish, mollusks and crab, and it poses no real danger to humans. 7 feet (18. They also eat squid and crustaceans (like crabs). Have you ever seen a lightning fast mouth eat a fish. Diet of the Goblin Shark The bulk of this species’ diet consists of fish in the teleost infraclass, including dragonfish, rattails, anglerfish, and more. Goblin Shark. The goblin shark comes from an ancient line of sharks believed to have changed little in the last 125 million years. 2. Bluefish. Goblin Shark By: Barrett Smith. These sharks are large, ranging from approximately 6. Like all sharks, it loses its teeth and grows new ones throughout its life. But in lower latitudes near California or Baja, they stay exclusively in deep waters, around 2,000 meters (6,500 feet). Oceanic whitetip sharks are top predators that love the wide-open ocean. They take cookie-shaped bites! The Cookiecutter Shark gets its name from the cookie-shaped bite wounds it leaves on its prey. Goblin sharks are deep-dwellers. These sharks only reach lengths of 6-8 inches, making them the smallest sharks in the entire world. One of the weirdest deep sea creatures is the fangtooth fish, which has a large jaw that can protrude out into the water. The Goblin Shark has a large, pointed protuberance on its head, its purpose is unknown. 5 feet ( 3. Surprisingly, sharks often consume stingrays – a feat of considerable bravery. Sheepshead. The. Although C. They will walk away from danger. The goblin shark (Mitsukurina owstoni) is a pink-skinned deep ocean-dweller with a very distinctive snout – elongated and flattened,. Great white sharks are another member of this order. Growing to a maximum length of 4. The upper jaw contains anywhere between 35 and 53 rows of teeth. The goblin shark jaws tend to widen up to three inches to catch the prey. With a swim speed of 2. However, pygmy sharks are fully grown when they reach 11 inches. There are more than 500 species of sharks, including Goblin Sharks, Hammerhead Sharks, and Whale Sharks, roaming around our oceans and, well, there’s really no need to be scared. 5 feet) in length. Another sea creature can depose a strange defense mechanism as a way to keep enemies at bay. It usually stays in water less than 50 m (165 ft) deep, in bays and estuaries, and often less than 1 m (3. There are 30% more females present in Scottish. It has also adapted the ability to flatten its fins to reduce its silhouette, making it difficult for its prey to spot it in the darkness. Have you ever seen a lightning fast mouth eat a fish. Goblin sharks are ovoviviparous, meaning that the eggs develop inside the mother’s body, but the young sharks are born alive. The photographs Moore provided to NOAA will help expand that knowledge. 4 Why are Goblin Sharks called Goblin. The typical lifespan in the wild for Hammerhead Sharks is from 20 to 30 years approximately. Scot was heading out from nearby Bolinas when he heard what was happening over the radio. ”. Humans very rarely interact with goblin sharks. The most distinctive characteristic of the goblin shark is the unorthodox shape of its head. The goblin shark (Mitsukurina owstoni) is an elusive deep-sea species of shark that is rarely seen. A Goblin Shark was discovered at the FMNH with a length of 12. 3 How Goblin Sharks Hunt and Reproduce. Male sharks have two fin extensions, called claspers, that they use to deliver sperm into a female sand tiger shark's two uteri, both of which are capable of. The goblin shark is clearly a predator, but other than that, we’re pretty much in the dark on its lifestyle. As apex predators of the deep sea, Goblin Sharks have developed unique feeding habits to sustain themselves in their harsh environment. ago. The Goblin shark is an incredible species that has survived throughout history due to its unique appearance and wide geographic range. One of the creepier fish is the goblin shark (Mitsukurina owstoni). The goblin shark is fast and aggressive, and will attack the player on sight. Cookiecutter Shark: The cookiecutter shark takes its name because it leaves a cookie-shaped bite hole in its predators. The epaulette shark has. It has a long, prominent snout which is covered in specific detecting organs (ampullae of Lorenzini) that allow it to detect electric fields in the deep, dark water where it lives. The natural diet of goblin sharks includes squids and crabs. They have narrow snouts and fanglike teeth. A goblin shark can use its jaws twice as fast as New York City’s pedestrian walk. There have been no documented cases of a larger goblin shark being captured than 210 kilograms, which measured 12. Great hammerhead sharks are apex predators and can be found worldwide in coastal, warm waters that are 68 degrees (20 degrees Celsius) or higher. How big is a Goblin Shark? Most Goblin Sharks are between 9. Interesting Ghost Shark Facts. The photographs Moore provided to NOAA will help expand that knowledge. The meat of the whale shark is considered a delicacy in Taiwan. Shark Fact #88. A Goblin Shark can travel at speeds of up to 15 miles per hour. Great white sharks are huge, powerful predators that have developed a fearsome reputation as one of the most prolific “man-eaters” on the planet, with up to half of the annual shark attacks on humans reportedly caused by them. Latin name:. A goblin shark can open its mouth wide, approximately to an angle of 111-degrees. 4. These sharks have the largest teeth of any shark species at any location. Since most commercially caught fish are predators, fishing and shark finning are resulting in a rapidly decreasing number of predators in the marine ecosystem. It lives in very deep water, far from humans, and it is thought to be a poor. Vědci, kteří studovali tato zvířata a jejich stanoviště, se však domnívají, že se jich mohou živit. Named for its peculiar, blade-like snout and toothy, forceps-like jaws, the Goblin Shark ( Mitsukurina owstoni) is arguably the weirdest of sharks. The goblin shark is one of the only shark species whose teeth are visible when it’s mouth is completely closed. It has pink-toned skin and a distinctive snout shape. Predators And Threats. Learn all about this deep-sea predator today!The Goblin Shark (Mitsukurina owstoni) ~ "This shark is found in marine water to depths of about 1200m. 6 feet (3. The Goblin shark is a truly unique top predator in deep sea. Their feeding based mainly on migratory fish suggests that. By far, the most serious threat to this species is from humans. However, some researchers believe that blue sharks may prey on and eat goblin sharks. Like a tiger, it’s a fierce predator. Blue Sharks and other sharks will eat them in large numbers. They lived during the Late. " Link. The Goblin Shark, a fascinating aquatic species, is one of the world’s most fascinating creatures. Goblin sharks are ovoviviparous, meaning that the eggs develop inside the mother’s body, but the young sharks are born. Its common name comes from its enormous eyes, which are placed in keyhole-shaped. Black-dotted photophores (red arrowhead) observed between the placoid scales (delimited areas) at the (C) rostral. 1. Moments after, two goblin sharks begin to follow a group of teens on a boat. 1. Learn more about Goblin Sharks. Additionally, its dark color camouflages it from predators and helps it to blend in with its surroundings. This depends on the genetics and environment of the animal. The truth is that most sharks are carnivorous and efficient predators, although some others feed on plankton. The average adult size of a Goblin Shark is 11 feet tall, but the. The goblin shark is an enigmatic species whose dietary habits reflect its deep-sea lifestyle. But there is no evidence of this. They have the slowest evolving genome of all known invertebrates. Goblin shark: The deep sea predator with a protruding snout Of the several hundred species of sharks found around the world, the goblin shark is undoubtedly one of the most unusual. 6 feet (3. The odd-looking goblin shark makes a distinct impression with its flabby body and shovel-like snout set above a. Goblin sharks are opportunistic predators that feed on a variety of fish, including deep-sea species like lanternfish and dragonfish, as well as bottom-dwelling creatures like crabs and shrimp. Before that, in 2014, a goblin shark was captured in the Gulf of Mexico. The tiger shark is one of the requiem sharks, renowned as formidable predators with powerful jaws and razor-sharp teeth. The bigeye thresher ( Alopias superciliosus) is a species of thresher shark, family Alopiidae, found in temperate and tropical oceans worldwide. 84 meters) tall, according to the Florida Museum of Natural History. If the frilled shark wasn't scary enough, the goblin shark might give you nightmares. and they eat plankton there small fish. The Goblin Shark has to make do with whatever swims into its path. There have, however, been a few instances of goblin sharks attacking humans in the wild. Squalus ferox A. Some. Goblin sharks in their natural habitat are rarely seen and hardly ever captured on film. But the Goblin Shark is more of a slow swimmer. (A) Photophore densities for each studied zone along the shark body. First discovered in 1898, this nightmarish shark has haunted children’s dreams ever since. Many creatures can use electric fields to communicate, sense predators or stun their prey with powerful electric shocks, but how this ability came about was a mystery. It has a torpedo-shape which reduces the amount of drag when burrowing underground. The dermal denticles are arranged in such a way that they help the goblin shark to swim more efficiently. Goblin Shark. Saw sharks and frilled sharks and ghost sharks, oh my! All sharks are pretty wild in one way or another—but these sharks might just be the wackiest of them all. The sand tiger’s. Most sharks have triangular dorsal fins but the dorsal fin of Stethacanthus was shaped like an anvil with a broad flattened top. ”. The megamouth shark is known for its large head, unusually large lips and oral cavity – which it swims with wide open, catching krill,. 5-3. The Goblin shark is found in deeper waters. You. These sharks are large, ranging from approximately 6. Marine hatchetfishes are found at depths ranging from 50 to 1,500 m. The Goblin Shark can grow up to 4 meters in length and is a sluggish predator that feeds on a variety of. Fun facts about the Porbeagle Shark: This shark has many nicknames, including the bottle-nose shark and bluedog! Scientists believe their main predators could be the great white shark and the orca. The Goblin Shark’s basihyal (‘tongue’) is large and highly mobile, while. 歐氏尖吻鮫（學名：Mitsukurina owstoni） ，又名歐氏劍吻鯊、歐氏尖吻鯊，也被稱為哥布林鯊（Goblin Shark），是尖吻鮫科（或稱尖吻鯊科或箕作氏鯊科）下的唯一一個现生物種，大約有1. 8. Goblin sharks, on the other hand, may have predators like Blue Sharks, and other bigger sharks. However, they have been known to eat all sorts of animals, including dolphins. Slow and Steady. The horned lizard can shoot blood from its eyes, which is toxic to canines and tastes terrible to other predators. Humans are thought to be their primary predators because they have been captured and displayed in museums. —Rare 1,760-pound goblin shark pregnant with 6 pups trawled up from Taiwan watersDespite their frightening name, the goblin shark is a critical predator in the ecosystem. These help Goblin Sharks detect the electric fields produced by the movement of other sea creatures and potential prey. A Japanese fisherman spotted a strange eel-like creature and alerted the Awashima Marine Park in Shizuoka who captured the animal. Mountain gorillas weigh between 300 and 485 lbs. We see this mirrored in many other deep-sea predators,. Diet: Fish, such as rattails and dragonfishes. EMBRYOS CANNIBALIZE EACH OTHER. This is a tactic they use to help them avoid predators. They are the among the oldest fish in the ocean. Longfin mako sharks are predators that. A Goblin Shark was discovered at the FMNH with a length of 12. The mukade is an aggressive predator that normally eats insects and spiders, but it won’t think twice about trying to take on larger prey like mice and small reptiles. Pups measure 2. Although some species can change color within seconds to blend into their surroundings, it’s unlikely an octopus will be able to escape from a shark this way. Jessica Morris of Humane Society International calls shark culling a "knee-jerk reaction" and says, "sharks are top order predators that play an important role in the functioning of marine ecosystems. The goblin shark has a mouth that is shaped like a parabola. What animals are predators to the Goblin Shark is unclear. It hunts for teleost fishes, cephalopods, and crustaceans near the sea floor or in the middle of the water column. A turtle can grow to be 12 feet long and can reach depths of 800 to 3,000 feet in all three major oceans over the upper continental slope, where it spends the majority of its life. These names come from the features that babirusas share with both kinds of animals. Goblin sharks are soft-bodied predators. Mitsukurina owstoni. Greenland sharks are among the world’s chilliest predators. Greenland Shark. Using a combination of powerful body slams and vicious bites, sharks pummel, disorient and tear apart their enemies. Sharks fertilize the egg within the female body which is unique for a bony fish . A tooth from a goblin shark was even found in an undersea cable which had been at 4,490 feet. Here, it is essential to note that nothing much is known about goblin sharks. Humans catch and kill over 100 million sharks every year. The goblin shark, Mitsukurina owstoni, is a deep-sea shark, the sole living species in the family Mitsukurinidae. Kingdom: Animalia: Phylum:Sharks are important predators that play critical roles in ocean food chains. In a study, scientists discovered that goblin sharks have a’slingshot feeding mechanism,’ which involves high-speed jaw. The Goblin Sharks are unlikely to attract a large number of predators because they live deep in the ocean. These intriguing creatures possess a distinctive appearance characterized by long, flattened snouts, protruding jaws, and needle-like teeth. Taxonomy. That’s why many of their characteristics seem out of place against other oceanic species. These sharks are very similar to the goblin sharks that live today, but some key changes differentiate the two including their fins. A deep-water dweller by nature, the goblin shark is a rarely seen oddity. the White Shark is an apex predator found worldwide in. Goblin sharks are ambush predators, using their camouflage and bioluminescence to hide from their prey. There is little to no information about any potential predators of goblin sharks. The average adult size of a Goblin Shark is 11 feet tall, but the largest one ever measured was 12. Goblin sharks appear to be pink due to the blood vessels visible through their translucent skin. History - Cretoxyrhina was a genus of mackerel shark more commonly known as the Ginsu shark. 84 meters) tall, according to the Florida Museum of Natural History. Since these sharks live very deep in the ocean, they are unlikely to have many predators. It has many people reminiscing about long-extinct dinosaurs. Each fish has its own signature something that sets it apart as one of the planet’s scariest sea creatures. The Goblin Shark, or Mitsukurina owstoni, is a rare and mysterious deep-sea species of shark found in the waters off the coasts of Japan, South Africa, and Australia. They dwell in the. Its unusual and “creepy” appearance is often described as fossil-like (similar to the frilled shark). The Goblin Shark is an amazing species that has adapted to survive in the deep-sea environment. Dragonfish, rattails, anglerfish, and teleostific species are among. Goblin sharks are not very dangerous, especially not to humans. The front of the goblin shark has long, sharp teeth. They are recognized by their white-tipped fins. The diet of the goblin shark is similar to most other marine predators and is largely comprised of fish, crustaceans, and squid. Then there’s the lower jaw which has 31 to 62 rows of teeth. . It is understood that sharks are going to live where the water is deep enough. There are no reported incidents of Goblin Sharks attacking humans. The goblin shark has many teeth arranged in multiple rows. The largest specimen recorded was about 8. These bellies allow them to disguise themselves against the brightness of the ocean surface while hunting prey. Sandbar sharks or Brown sharks are considered to live between 20 and 30 years. Sharks sometimes act as scavengers and will often feed on dead animals such as whales. Because they lack a swim bladder to adjust their buoyancy manually, their tissue serves as their primary source of neutral buoyancy. Well that is the goblin shark, a unique fish, tertiary consumer, and a predator of the deep. The fossil record of a Goblin shark shows that it lived at the bottom of the ocean along. What are goblin shark's predators? squid, and sea turtles eat them. Shark fossils date back more than 400 million years – that means. Discovery the different sharks that roam the deep blue sea!Subscribe to the official Wild Kratts channel for a brand new video every Wednesday!Check out the. The goblin shark is a rare species of deep-sea shark. It is a fascinating and little-understood creature of the deep sea. It doesn’t have to contend with many predators in its habitats, so strength – when compared to other sharks – isn’t that much of a defining feature. Because goblin sharks are rarely seen in the wild and nearly never filmed, most of what scientists know about them comes from their inadvertent capture in fisheries aimed at other species. Scientists have been fascinated by the. They are one of the three living filter feeding shark species that consume plankton, alongside the whale shark and the megamouth shark. which may look like a little fish to other predators and entice them to attack. The hammerhead shark is a group of species in the family Sphyrnidae. The Goblin shark can be easily identified by its long, flattened snout. (Martin, 1999) Ecosystem Roles. Once a shark is killed, the player will be able to either drag it to shore to. They are the dominant predators in their habitat, eating. They are found worldwide in warm-temperate waters,. Predators of Goblin Sharks. One thing that’s fairly certain: At their size, goblin sharks have few natural predators, according to Carlson. The goblin shark differs from other shark species by having a flattened snout that protrudes from the top of its head, resembling the blade of a sword. When it detects a suitable target, it. Ocean predator. Its translucent. HABITAT: Primarily found in the deep sea, typically between 200 and 1,200 meters. Goblin sharks, also known as the “living fossil” sharks, are one of the most mysterious and intriguing creatures of the deep sea. Because there are few known predators of the goblin shark. “They’re a species we don’t know much about at all,” Christopher Bird, a PhD. They have around 3 4-53 teeth in their upper jaw and 31-62 teeth in their lower jaw . The Goblin shark has an elongated, flattened and prominent snout covered with special sensing organs making it aware of electric fields in the deep, dark water it calls home. Badass pictures, gifs and videos of the awesome yet vicious cycle of natureThe goblin shark nabbed off Key West, Florida which was 18-feet-long, pink, and has a long snout to conceal it pointy teeth from prey is the second ever of its kind to be seen in the Gulf. We don’t know what its unusual nose is for, but this creature can reach out with. In this video, we will explore the unique character. Sharks have played a vital role in maintaining healthy oceans for hundreds of millions of years as a top predator. Interesting Aye-aye Facts. Sharks are fast and agile swimmers who. 8 m). It will soon…. Thresher Shark Predators and Prey. It lives in very deep water, far from humans, and it is thought to be a poor swimmer and have bad eyesight. Female Goblin sharks reach maturity at the ages of 2,64 to 3. 9. The caudal fin of a Goblin Shark is elongated, almost like on a Thresher Shark, but lacking its functionality. Amanda Martinez is a seasoned author with a deep-rooted passion for sharks and. With their long, flattened snouts, protruding jaws, and distinctively elongated, bladelike teeth, goblin sharks stand out as one of the most visually intriguing creatures of the deep sea. They typically eat smaller fish, squid, and crustaceans. When this shark bites a prey, the mouth opens, and the basihyal drops, creating an oral cavity that is used to suck in water and its prey. Their unique appearance makes goblin sharks easy to identify. The tail of the pink fairy armadillo is more than just an appendage that hangs from the rear of the body. Nema puno podataka o tome koje bi druge životinje mogle biti grabežljivci ovih morskih pasa. It snaps its jaw forward to catch the victim. The goblin shark, or Mitsukurina owstoni, is a rare shark species that can only be found in Asia. The shark is also known as the “elfin shark” or the “Mitsukurina owstoni. Read. Není mnoho informací o tom, která další zvířata mohou být dravci těchto žraloků. There is no mistaking this deep-sea creature for anything other than what it is. of Species: 3: Conservation Status: Vulnerable (Pelagic & Common Thresher), Endangered (Bigeye Thresher) Thresher sharks are in the same order as great whites, basking sharks, the megamouth shark, and unusual goblin shark. They are thought to be active predators and prey on a variety of fish, squid, and crustaceans. The Goblin Shark’s strange-looking jaw can stretch forward to catch passing prey. The rare goblin shark was caught by fishermen off Green Cape on the NSW south coast and was taken to the nearby town of Merimbula for examination, February 2, 2015. Somehow, these predators eat enough to support a respectable frame. The list of goblin shark prey includes crabs, squids, and different small species of fish that are caught by them. The scientific name of this shark is Mitsukurina Owstoni. While human encounters with goblin sharks may be few and far between, what we do know about them has made one thing pretty clear—far from an athletic and speedy predator like a great white or mako shark (their. 19. When feeding, the goblin shark extends its jaws faster than other species of sharks. They clock in at an impressive 60 mph (96 kph) and can swim. The designation as “Minor Concern” on the UICN’s Red List of “Aliens” reflects the fact that the goblin shark is rarely seen or captured. 8: Big Mouth. Despite its unusual appearance, little is known about this incredible creature, including its conservation status. 2. Although preserved specimens are brown, living sharks are pinkish-white, with slender, unusually soft and flabby bodies. The rare goblin shark was caught by fishermen off Green Cape on the NSW south coast and was taken to the nearby town of Merimbula for examination, February 2, 2015. It hunts alone and stealthily stalks its prey in calm eddies only to chase it into turbulent waters for the kill. Electric Eel. These mysterious creatures have been rarely seen in the wild, and remain one of the least studied species of shark in the world. It was. 8. Despite their slow movement, goblin sharks are still powerful predators. Unlike most deep-sea sharks, the Goblin has smallish eyes with fully functional irises that contract and dilate. Because the shark is slow and awkward, it cannot hunt down prey and must instead wait for prey to approach it. This sensing organ will help the Goblin Shark move, swim, and find prey. In a physical confrontation, a shark defends himself using a variety of tactics. The goblin shark is a rare, elusive shark that gives off a serious pre-historic vibe. 6. 6 feet. What is the size of a Goblin Shark? The average Goblin Shark is between 9. These deep-sea predators are one of the most recognizable species of shark due to their strange shaped head known as a cephalofoil. The skin of a goblin shark is usually grayish-pink in color and is quite thick, which helps to protect the shark from the elements. It has a shovel-like snout, a flabby body, and a weak lower lobe, all of which. While human encounters with goblin sharks may be few and far between, what we do know about them has made one thing pretty clear—far from an athletic and speedy predator like a great white or mako shark (their relatives in the order Lanmiformes, or mackerel sharks), goblin sharks live seemingly mellow lives. They are also as long as the carapace and all but the fingers are covered in fine hair. VIDEO: Are Goblin Sharks As Dangerous As They Look? Mako Sharks. As predators, sharks play a vital role in the health of marine ecosystems, by eating fish they help create balance in the food chain. 8 metres), has a flabby body and soft skin that, in life, is colored pinkish grey. But the Goblin Shark is more of a slow swimmer. The Goblin Shark, a fascinating aquatic species, is one of the world’s most fascinating creatures. Its head consists of a fourth or fifth of the whole body of the shark. It is the second largest predatory shark after the great white shark, measuring over 5m (16ft) in length and. Goblin sharks can reach some 10. They include some famous shark species, such as the great white and goblin sharks. The human ear can’t pick them up underwater, but the blue whale happens to make the loudest noise of any animal, up to 188 decibels, which is louder than a jet engine. The goblin shark, or Mitsukurina owstoni, is a rare shark species that can only be found in Asia. The claws of the yeti crab are a mathematical wonder. A Goblin shark is a demersal (dwelling at or near the bottom) shark that lives on mesopelagic shelves and slopes in outer continental waters ranging from 40-1,200 meters deep. When threatened, a Whale Shark can accelerate their movements to 3 to 4 mph, which is still slow by a shark’s standard. Habitat The goblin shark is often found in the deepwater environment and rarely seen on the. Find out more about their slow speed, narrow snouts and fanglike teeth. The common name is derived from a distinctive, thresher-like tail or caudal fin which can be as long as the body of the shark itself. It also has a distinctive color that ranges from pinkish grey to purplish grey. Great White: Longevity We would like to show you a description here but the site won’t allow us. They average in weight is 450 pounds and their location and food sources play a role in overall size. 8 meters (12. On the other hand, Goblin Sharks sometimes fall prey to other sharks, like the Blue Shark, themselves. 8-Thrash (or one of the ones from 6) 10-Monks flurry. You. The pink-skinned animal can catapult its jaw forward by two pairs of elastic ligaments along the mandibular joint. Males can reach up to lengths of 12. The Goblin shark is one of the world’s most powerful predators. Despite its formidable appearance, it falls prey to few animals. It has a long, prominent snout which is covered in specific detecting organs (ampullae of Lorenzini) that allow it to detect electric. The Whale Shark is the biggest fish in the world. Some are fearsome predators which devour anything in their path. 138 Words1 Page. Unlike the goblin and frilled shark, the ghost shark makes a regular appearance on dinner plates , often sold as "whitefish" for fish and chips. Overall, the goblin shark is a fascinating and important species that highlights the incredible diversity of life in the ocean and the importance of. In general, the best place to encounter a Goblin shark is off the coast of Japan. In addition, the dermal denticles provide the goblin shark with some protection from predators. By Ed Yong. The Goblin shark is a bottom-dwelling shark, being found in waters as deep as 4265 feet. Whale Sharks move intentionally slow when they’re feeding at the surface. There's a reason it has the Sniper skin and you don't. Sharks are cold blooded, and that would usually imply that they would search for areas where the temperatures are very cold. Many have several rows of teeth and can lose and replace thousands of teeth in their lifetimes. Goblin Shark prey and predators. . Goblin Shark Research Paper. The remarkable snout—elongated, flattened, and sharply pointed. They have the slowest evolving genome of all known invertebrates.