Cameron and Mady

Swim Bladder

A swim bladder is a gas-filled sac present in the body of many bony fishes, used to maintain and control buoyancy.


Fish eyes are similar to terrestrial vertebrates like birds and mammals, but have a more spherical lens. Some fish can see ultraviolet and some are sensitive to polarized light.


The difference between fishes and humans anatomy are:

-swim bladder

-fishes have smaller brains

-stomach shape

-intestines shape

-fishes have gills

-fishes have four chambers of heart

-Fishes have an "S" shaped heart

-different teeth shape

-skin layer

Big image


Fish sleep any time of the day. However, they sleep with their eyes open, because they do not have eyelids. They have to keep moving while sleeping to get a constant flow of oxygen through their gills. Certain fishes go to sleep in certain spots to stay away from predators.


Most fish communicate with body language while others communicate by making noises. How they communicate by body language is they flare out gills.