I’m guessing there is an error with 16. Lantern sharks. Sharks : Facts and Information. The shark species as we know them have been around for 100 million years; this means that they were dwelling the oceans when dinosaurs were roaming the land. Sharks belong to the subclass Elasmobranchii. – Source, 11. Sharks are fish. Most shark species have pointed snouts that house several rows of sharp triangular teeth. Contrary to popular belief, only 34 shark species are involved in such attacks and therefore are dangerous to humans, among them, the tiger shark, the bull shark or the great white shark. Sharks have the same five human senses like us. You’re more likely to be crushed by a falling vending machine, or be struck by lightning. Species that do not have this membrane instead roll their eyes backwards when striking prey. Even more, many species are docile and harmless. 126 species. (2 species) 2) These super swimmers are the largest predatory fish (fish that eat other fish or animals) on our planet. 143 species are currently listed by the IUCN as being under threat, with a conservation status from vulnerable to critically endangered. To most people, the word ‘shark’ conjures up an image of a large, sharp-toothed predator capable of bringing a beach holiday to a sudden (and unpleasant) end! The skeletons of cartilaginous fish such as sharks are made of cartilage rather than bone. The reasons for this behavior have not yet been identified. Gulper sharks. The first sharks lived more than 400 million years ago—200 million years before the first dinosaurs. Coastal development, including the destruction of mangroves and coral reefs, is a threat to many shark species, as they use these areas for hunting, breeding, and protecting their young. Unlike many mammals, the shark’s nostrils are used purely for smell as opposed to breathing, and are located on the underside of their snout. (8 species) Published August 21, 2016 Updated July 14, 2020. The shark embryos are known to be notoriously cannibalistic. They are one of the earliest known jawed fishes. Hundreds of millions of sharks’ fins are cut off while the shark is still alive. Even though there is some information, there are still plenty of theories that have yet to be proven or disproven in regards to how these creatures changed and survived over time spanning more than 400 million years ago. Sharks have been around for nearly 400 million years and were about 200 million years older than dinosaurs. They have nictitating membranes in their eyes, anal fin, and five gill slits. Short on time? Frilled sharks. Why are whale sharks endangered? Copyright © 2020 ActiveWild.com. Mating between sharks is still rarely observed, especially between the larger species such as the great white. However, most of the experts agree that when a person is attacked by a shark, it is due to them being mistaken for a food source that they would normally find in the water. Here are 25 Interesting Facts About Sharks. 280 Species. Eight families. These specialized organs can sense the electrical fields generated by the muscle contractions of other animals. Sound travels faster in water, and sharks rely on sound heavily. The area has very little food for the animals and researchers describe it as the shark equivalent of a desert. 16 species. Only a handful of species are solitary hunters, such as the great white shark, but even these species often coexist at active hunting or breeding grounds. 5 Birds Perfectly Adapted to Modern Cities. Sharks are often caught as fishing by-catch, which means they are caught accidentally by fishermen targeting other species. (2 species) Tiger Sharks are known as ‘the Wastebaskets of the sea’ as they are known to eat anything, such as floating garbage! (30 species). Large-scale fishing operations are also a threat to shark populations. The behaviors of sharks can be fascinating to explore. This heat increase may allow the sharks’ muscles to work more efficiently, therefore increasing their swimming speed while hunting. Ancient Sharks lived before land vertebrates populated the Earth and even before many plant species developed on continents. Sharks are predators that feed on animals such as fish, seals, and whales. This is possible due to the swimming being coordinated by their spinal cord as opposed to their brain. One is a lateral line, that runs down each side of the. Sleeper sharks. Populations of shark have decreased by 90% since large-scale fishing began. Whale sharks. Many people will already have their own idea of the typical behaviour of a shark – a solitary creature roaming the seas in search of prey, attacking ferociously and instilling fear into those who dare venture into the ocean. The oldest scales suggest sharks first appeared around 450 million years ago. Barbeled houndshark. Sharks are 470 species belonging to the superorder Selachimorpha. These unique animals cause all kind of human feelings: fear, awe, curiosity, respect and love. – Source, 6. All sharks are large and have very sharp teeth. This results in a relatively high survival rate when compared to a large number of poorly developed young. Requiem sharks. They are commonly found to a depth of 2,000 meters, with some existing even deeper. (21 species). Some female sharks can give birth to an exact genetic clone of themselves without the need for a male. The youngest living group of sharks is thought to be the hammerhead sharks. The largest shark and the largest fish in the... Habitat and Range. Sharks are a large group of fish that have inhabited the oceans for over 400 million years, even before dinosaurs populated our planet. 1-5 Interesting Facts About Sharks 1. Sharks have a long history on our planet, having inhabited the oceans for over 400 million years – long before dinosaurs appeared. – Source, 19. d*ck Richards, the original director of the movie Jaws, was fired because he kept calling the shark a whale. Megamouth sharks (1 species) Out of over the 350 different species of sharks that we have, only about 30 of these species have ever attacked humans. Finback catsharks. (8 species). This liver takes up around 30% of their total body mass, and they use this in conjunction with forward movement to control vertical position. Top 10 CQC (Close Quarters Combat) Weapons, 10 Largest Ancient Sharks to Roam the Oceans, 25 Kickass and Interesting Facts About Whales, 25 Uplifting Headlines of the Week – Part 203, 25 Interesting Shower Thoughts – Part 149. While not as visibly present, sharks do have ears which are located within a small opening on each side of their head. This means that a shark has to keep swimming in order to prevent itself from sinking, using its pectoral fins like the wings of a plane. This is based on fossilized remains and the overall evolution process. Let’s take a closer look at each of these eight orders and the families that belong to each of them: This classification includes the most primitive sharks, those with six or seven gill slits, a dorsal fin, and lack of nictitating membranes in their eyes. Some tails boast large upper lobes for slow cruising with short and sudden bursts of speed, whereas others have larger lower lobes for continued pace. However experiments have shown that some species are able to ‘sleep swim’, in which they are essentially unconscious while meandering around the ocean. A testament to just how effective their anatomical make-up is. This order includes species characterized by having two dorsal fins and five gill slits. This is an area of research where more information is still needed to make a good determination. Often there is just one layer of tesserae, but larger sharks such as the great white shark have three or more layers. 1. Teeth which serve no purpose at all are found in plankton feeders such as the basking and whale shark, who use their gills to filter feed. Fun Facts About Sharks for Kids. With over 500 known species to date, sharks come in a variety of different shapes and sizes, each with their own unique behaviours and fascinating anatomy. They have changed very little over the eons. In addition, sharks have a lateral line (organs running along the side of the body which are used to sense movement), pit organs (small holes under the scales which are thought to detect water currents), and ampullae of Lorenzini. The fastest shark is the shortfin mako shark which can swim 40-45 miles per hour. Their evolution has produced several species with different sizes, anatomies, habits and behaviors. Shark fins are often removed while the shark is still alive, with the shark being thrown back in the water to die from its injuries. Bramble sharks. It’s hard to see in the murky waters of the deep, but sharks have excellent vision. The second largest shark (and second largest fish) is the basking shark, which can reach lengths of up to 33 ft / 10 meters. Most sharks are cold-blooded. Mature Great Whites can reach upwards of 21ft in length, with an approximate weight limit of 7,000lb! Megalodon is a distant relative of today’s great white shark. While some of them are filter-feeders, others must … Sharks And Their Relationship With Humans, Threats To Sharks / Endangered Shark Species, Endangered Animal Stories: Short Stories About Endangered Animals – Available in Paperback and on Kindle, Fun Facts On Snakes: Interesting Information On Snake Species, Ecology, Lifestyle & Evolution. (2 species) Sand sharks (3 species) – Source, 14. Maturing slowly and reaching a reproductive age anywhere from 12 to 15 years. They have been widely represented in the popular culture as ruthless predators, which is the main reason why they cause all these different reactions. The second, is that sharks have tiny pores on their head, called the ampullae of Lorenzini. Nurse sharks. Nearly all sharks are found in marine (saltwater) habitats; only the river sharks and the bull shark are found in freshwater habitats. (44 species) 3. (18 species) Among the large variety of species, there are many with an anatomy different than the torpedo-shaped body and huge teeth like the great white shark. 1. The largest embryo in a shark litter is known to eat its fellow embryos, in an act known as intrauterine cannibalism.Researchers looked at this phenomenon in sand sharks, noting that, "While 12 littermates may start out the journey, all but one is devoured by the biggest in the pack. 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