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Sharks
When many think of sharks, they think of the movie Jaws or a dangerous man-eating fish. In reality, sharks is a large group of fish that includes very small to much larger fish. Some can be harmful to man and others are harmless. To delve into this interesting and diverse group of cartilaginous saltwater fish that have sharp teeth and a bad reputation, ask your questions in this category.
5,520 Questions
How do sharks respond to their environment?
Sharks are highly adapted to life in the sea:
- They absorb oxygen from the water with gills
- They have sleek scales that allow them to glide through the water
- They have powerful tails to swim with
- They have torpedo-shaped bodies to allow them to slide through the water
- They have sharp teeth to catch prey with
- Their teeth constantly regrow if one is lost so that the shark is always at top form
- They have extraordinary senses to allow them to detect prey in the water from miles away
What is the name of people who study sharks?
Marine biologist or ichthyologist, a person who studies marine fish or Zoology
Why does a shark need a stomach?
there food goes there what else would it be for
By Carrie, Lori and John
How do sharks get into the ocean?
They are born in the water and spend the rest of their lives in the water. If your wondering how they breath then this is how! When the GWS moves it pumps water through its gills, the GWS cant stop moving or it well suffercate, that is why most people disagree with under water nets.
What part of the ocean do cookiecutter sharks live?
It lives in a little part of the sea called bikini bottom.
What makes the great white shark deadly?
i think the thing that makes the great white shark a ferocious and fierce dweller are its teeth it can grow up to 100 teeth! all of which are lethally sharp but it can also smell a drop of blood in ten gallons of water and can detect faint electric currents such as a heart beating.
According to R. Aidan Martin (here:- http://www.elasmo-research.org/education/topics/r_smallest_shark.htm)... "...the smallest known extant shark species appears to be Etmopterus perryi, males of which mature at 16 to 17.5 cm TL* and gravid females have been found at 19 to 20 cm TL (Springer & Burgess 1985). One 19-cm TL specimen of E. perryi was found to contain three 6-cm embryos, each bearing external gill filaments. In comparison, the smallest mature male E. hillianus examined by Schofield & Burgess (1997) was 20 cm TL. Until the discovery of E. perryi, the smallest living shark was widely considered to be Squaliolus laticaudus, males of which mature at about 15 cm TL and females at about 17 to 20 cm TL (Compagno 1984). This and other tiny squaloids are closely rivaled by the carcharhinoid Eridacnis radcliffei, males of which mature by 18 to 19 cm TL, females possibly mature at 15 to 16 cm TL. Etmopterus perryi has the common name Dwarf Lanternfish.
Etmopterus hillianus has the common name Carribean Lanternfish.
Squaliolus laticaudus has the common name Spined Pigmy Shark.
Eridacnis radcliffei has the common name Pygmy Ribbontail Catshark. * I assume 'TL' indicates the total length but cannot confirm this.
Who are some predators of the great white shark?
Adult Great Whites are apex predators. Apart from the Orca (Killer Whale), there are no known predators that may attack or kill a Great White. In regions where both the Orca and the Great whites inhabit and compete for food, Orcas may attack and kill these sharks. Since Orca's are much larger than them, they can attack and even kill great whites.
Are great white sharks bigger than basking sharks?
Basking sharks are meat eaters they love to eat little children from ages 1-18 and swim around slowly with their mouths wide open. They are larger than the great white and are of a gray colour.
The great white eats things like seals and have a mouth full of impressive teeth the jaws of which they can telescope outwards. They are a very active swimmer and are paler in colour.
Addendum: All the above is correct except the part about basking sharks being meat eaters. They are plankton eaters.
How often did a megalodon eat?
Megalodons eat a variety of animals,small or big fish & small whales,are on the top of the menu.they may have eaten up to a ton of fish & 1-3 small whales in a day or two.
Are there sharks in the Black Sea?
The Black Sea is not as hospitable to sharks as open ocean waters would be because it has lower salt levels and the waters get much colder during the winter. However, there have been transient sightings of hammerhead sharks, benthic sharks and cat sharks in the Black Sea.
Organisms living in close association often to the benefit of both is called?
An interaction in which one organism lives in a close association with another is called symbiosis. There are three types of symbiosis; mutualism, parasitism, and commensalism. In mutualism, both species benefit from the association; in parasitism, one species benefits at the expense of the other; and in commensalism, one species benefits and the other species is neither harmed or helped.
How many teeth does megalodon?
Most sharks have about 3-5 rows of teeth at any time. The front set does most of the work. The first two rows are used for obtaining prey, the other rows rotate into place as they are needed. As teeth are lost, broken, or worn down, they are replaced by new teeth. Megalodon may have had hundreds of teeth at one time.
What are the physical characteristics of a dogfish shark?
Most Dogfish Are Charactisted As Small, Brown, Unintelligent, Slow And Wandering Fish That Like To Mainly Eat Crabs, Lobsters, Fish, Squid, Octopuses And Smaller Sharks. They Might Also Bite Chunks Out Of Large Whales. Dogfish Sharks Are Quite Gentle To Humans When Meeting Them. They Are Also Quite Shy. They Mainly Live In Deep, Dark Waters That They Probably Use To Escape From Predators Such As Orcas, Great White Sharks And Bottlenose Dolphins. They Also Probably Live In Deep, Dark Waters So That They Can Match The Darkness Of The Waters To Catch Prey. They Also Encounter Another Predator. The Giant Pacific Octopus. Which Can Grab The Dogfish With It's Tentacles. The Spiny Dogfish Are The Most Commonly Known.
How often do basking sharks eat?
They would stalk their prey, swim up to them unnoticed (usually from behind or under) and sink their razor-sharp teeth into the flesh of their prey and devour it by tearing it into pieces if it was a big one.
How is swimming accompolished in bony fish as compared to shark?
Sharks are set apart from other fish mainly by their body composition. Usually fish have skeletons made of bone, just like mammals, reptiles, amphibians and birds. Sharks are unique in that their skeletons are made entirely of cartilage. Cartilage differs from bone since its flexible, but it is similar in sturdiness. Also cartilage had less density than bone, which keeps the shark lightweight so they don't sink in the ocean and prevents sharks from needing an air bladder like other fish. Another unique feature of the shark is its skin texture, which consists of a type of scales called denticles. This differs from bony fish which have large noticeable scales. Denticles are aligned in such a way that water is channeled over the body minimizing drag. Sharks are similar to bony fish in that they both breathe by extracting oxygen from the water. As the shark moves, water enters the mouth and passes over the gills and escapes via gill slits behind its head. The oxygen gets diffused into the sharks bloodstream as the water passes through. These slits are covered in bony fish, but are exposed in sharks. The majority of bony fish depend on a swim bladder which navigate them through the water. The bony fish takes in oxygen and releases a portion of the gas into the bladder, which increases its buoyancy causing the fish to rise. When the fish sinks, it does this by squeezing some of the gas out of its bladder, which decreases its buoyancy. So in essence, a bony fish is kind of like the good year blimp. The shark on the other hand is more like a plane, without a swim bladder it uses its own forward movement to control position. Much like a plane uses its propeller, a shark uses its tail to move forward by swinging it back and forth. This forward movement pushes water around the fins, creating lift.
Who would win in a fight a bull shark or a crocodile?
It depends if lion is far away or not. If it is at a distance where it can sneak up on the bull from behind it has some sort of an advantage over a bull, but if the bull were face a lion in close combat the lion would indeed loose, resulting the bull as the winner.
The reason this is probable because, in the wild, a lone lion may try to hunt a Cape Buffalo bull, but since such an animal is built with a lot of power, sharp hooves and horns, and a very aggressive nature, such a beast is very intimidating for a lone hungry lion: even a pride of lions! This would be the same case with a domestic bovine such as a bull, especially one that has horns and a nasty temperament like that of a Spanish Fighting bull. Lions would much rather go after prey that runs away from them, not turn and fight them.
What adaptations does a dogfish shark have?
The shark has a special adaptation called ampuli of lorenzini that helps them sense electricity made by other animals. Also, sharks very streamlined and fast in the water, which helps them to hunt easier.
What zone do blue sharks live in?
blue sharks live in a shark cave a meduim size whole that is inthe ocean that is a cave
They live far out to sea.
