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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.
What else can I help you with?
Would a shark be a bony fish?
No, because a shark is not a bony fish as it's skeletal structure is made of cartilage.
What do bony fish have that shark do not?
swim bladder.
What is the diet of a thresher shark?
Mainly bony fish.
What vertebrates lacks a bony spine?
One vertebrate that lacks a bony spine is the shark. Many different types of shark have cartilage instead of bones.
Does a shark have a bigger stomach than a bony fish of the same size?
No a shark has a bigger stomach
How is a bony fish diffrnet from a shark?
Sharks are from an older lineage of cartilaginous fish. Bony fish appeared afterwards.
Which has the most flexible skeleton a shark a frog or a lionfish?
A shark has the most flexible skeleton among the three. Sharks have cartilaginous skeletons that provide greater flexibility compared to the bony skeletons of frogs and lionfish. This flexible skeleton allows sharks to move more dynamically in the water.
Among jawed fish you have your bony fish and your cartilaginous fish Which of these is one of the latter?
One example of a cartilaginous fish is the shark. Sharks have skeletons made of cartilage rather than bone, distinguishing them from bony fish, which have skeletons made of bone.
How do the number and shape of fins of a bony fish differ from those of shark?
Bony fish typically have a greater number of fins than sharks, including paired pectoral and pelvic fins, a dorsal fin, and an anal fin, which are often more flexible and can be variously shaped. In contrast, sharks possess fewer fins, primarily including a larger dorsal fin, paired pectoral fins, and a caudal fin, which are more rigid and often triangular or crescent-shaped. The fins of bony fish are generally supported by bony rays, while shark fins are made of cartilage. This structural difference contributes to the varying swimming techniques and adaptations of each group.
What does bony fishes have that they can inflate or deflate to help they stay afloat even if they are not swimming?
swim bladder
Does cape Whiting have sharks in it?
Cape Whiting does not have shark in it, it is a bony fish called Hake - Merluccius Capensis.
What are the enemies of a hogfish?
Enemies of the ÊHogfish are numerous . Any larger bony fish or shark are a natural enemy of this species.
