Sharks are fish. They live in water, and use their gills to filter oxygen from the water. Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish.
Is a shark a mammal or a fish?
Unlike whales, sharks are not mammals but belong to a group of cartilaginous fishes.
Which class would a shark belong to?
What is a shark classified as in the animal kingdom?
Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral finsthat are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays.
Does shark lay eggs or give birth?
A huge variety of animals produce eggs. These help to protect and provide for offspring as they develop. There are over 500 species of shark living in waters around the world and the majority give birth to live young. The remainder are oviparous, meaning they lay eggs.
What color is shark blood?
From timber wolves to tiger sharks, most vertebrate animals have crimson blood in their veins. This hue is produced by hemoglobin, the protein that helps our blood distribute oxygen.
Is whale a fish or a mammal?
Whales and porpoises are also mammals. There are 75 species of dolphins, whales, and porpoises living in the ocean. They are the only mammals, other than manatees, that spend their entire lives in the water.
Do sharks have tongues?
Sharks have a tongue referred to as a basihyal. The basihyal is a small, thick piece of cartilage located on the floor of the mouth of sharks and other fishes. It appears to be useless for most sharks with the exception of the cookiecutter shark.
How deep do sharks swim?
They prefer waters with sea surface temperatures of 50 to 72 degrees Fahrenheit. White sharks have been known to swim as deep as 6,150 feet.
How long does a shark live?
20 – 30 yearsIn the wild
How can you identify a shark?
In the case of the whalers and similar sharks, the primary distinguishing features include: the presence or absence of obvious physical features such as an upper precaudal pit, interdorsal ridge or dorsal fin spines; the relative sizes and/or positions of the dorsal fins; and the size and shape of the upper teeth.
What is the most dangerous shark?
Because of these characteristics, many experts consider bull sharks to be the most dangerous sharks in the world. Historically, they are joined by their more famous cousins, great whites and tiger sharks, as the three species most likely to attack humans.
What is the smallest shark?
Do sharks give birth through their mouth?
After the brief courtship and one-night stand with the male, the female shark is left to carry the fertilized eggs in her oviduct, or womb. Port Jackson sharks do the same thing, carrying the egg cases in their mouth until they find a safe spot. …
How do female sharks get pregnant?
4. Conveyer belt babies. Adding to the discomfort of a 2-year gestation, some deep sea sharks are also able to get pregnant as soon they give birth. They accomplish this by cycling through a conveyer belt of babies, with fully formed pups at the bottom of the uterus and large eggs waiting to be fertilized at the top.
Are sharks born alive?
About 70 percent of sharks are viviparous, meaning they give birth to live young; the remaining 30 percent of shark species — plus near-relatives like skates, rays and chimaeras (an order that includes the spooky “ghost shark”) — are oviparous, meaning they lay eggs externally. …