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They do not have bones, instead they have cartilage. They can only swim forwards! A large oily liver helps keep them afloat. Also, eggs are fertilized in the female's body. They do not have gill covers.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoSharks do not have bones. They have skeletons made of cartilage.
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What do sharks lack that makes them different from many other fish?
Sharks have no swim bladder for buoyancy. Instead, an oily liver aids in bouyancy.
Which body features do bony fish have that sharks do not have?
Sharks, cartilage skeleton, lack scales, lack swim-bladder,Boney Fish. bony skeleton, scales, swim-bladder, interesting colouration.
What environmental pressures do sharks have?
Lack of food
What makes the ocean different from other ecosystems?
Salt water maybe, lack of dry, giant whales and sharks.
What does a shark have that other fish do not have?
Sharks and fish come from the same family. They are similar because both sharks and fish lay eggs to reproduce. Both cannot survive outside water and breathe through gills. They are both vertebrates and have fins as their locomotory organ They both have swim bladders too.
What features enables the shark to stay afloat more easily in water?
Sharks lack a swim bladder, which enables a fish to float. Sharks must swim constantly or they will die.
Does a shark have feeling in its dorsal fin?
No. Elasmobranchs such as rays and sharks lack nociceptors, the nerves that translate noxious stimuli into neural signals. Nociceptors appear in bony fish and basically all later vertebrates, as well as some invertebrates, but are absent in cartilaginous fish such as sharks.
What kind of food does sharks get energy from?
Energy is contained within proteins, and whale sharks get their protein from krill and other small marine life. Sleeping in fact has nothing to do with gaining energy, although lack of sleep will make your brain hide energy from you in an attempt to slow you down and get you to sleep.
What environmental do sharks have?
Lack of food
What are a fish's respiration organs?
The fishes respiration organs are the gills on both sides of the body that push the water in and out of the body of the fish that is why they move about so much when the fish are swimming.gills">gillsFish gills are covered with operculumn. Sharks and rays lack operculumn
What do invertebrate jellyfish lack that all other fish process?
spine
What would happen to the remora fish if sharks get extinct..would they just die?
Sharks are a big part of every sea ecosystem so if they become extinct most of the ocean ecosystems would be destroyed.
