Question

Mention two movement related differences between Sharks and other fish.

Answer 1



Is this reef shark swimming for its life?

JEFF HUNTER/PHOTOGRAPHER'S CHOICE RF/GETTY IMAGES

Most bony fish have a special swim bladderthat helps them move around in the water. When the fish takes in oxygen, it can release some of the gas into the bladder. This increases the fish's buoyancy, so it rises through the water. To sink down to the bottom, the fish squeezes some of the gas out of the bladder, decreasing its buoyancy. In this way, a fish is something like a blimp or hot air balloon that uses the upward lift of atmospheric buoyancy to change altitude.

A shark is more like an airplane. It doesn't have a swim bladder, so it uses its forward movement to control vertical position. The tail is like the shark's propeller -- the shark swings it back and forth to move forward. In an airplane, this forward movement pushes air around the wings. In a shark, this forward movement pushes water around the fins. In both cases, this movement of matter creates lift -- the fluid is different, but the principle is exactly the same.

Answer 2

Differences between Sharks and other fish:

• The two different between shark and fish are found in common basis is size.
• The shark is covered with tooth like scales called denticles.
• The shark has 5 to 6 gill on each side whereas the fish has one gill slit.
• The shark is large in size and shape compared to other fish.
• The shark is very is strong in eating the items, as the tooth of shark is very strong and sharp when compared to the fish, fishes have simple pointed tooth.

• The shark feeds on other small fishes.

To know more:

What is the difference between scoliodon fish and other fishes?

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