A fish that lives near the surface of the ocean most likely has a swim bladder (or a body cavity) that is full of

A fish that lives near the surface of the ocean most likely has a swim bladder (or body cavity) that is full of oxygen

Explanation:

The swim bladder is the organ present in the majority of bony fishes that provides buoyancy. The swim bladder is a bladder filled with oxygen and found in the in the body of the fish

The function of the swim bladder is to provide adequate ballast or hydrostatic balance to enable a fish to keep to a certain depth in a body of water thereby the fish does not float to the surface or sinks further

The swim bladder is also used as a sound communicating organ.

28. evolution

29. environment, survive, offspring  

explanation:

i dont know but

explanation:

whoever your teacher is, deserves a raise for using pokemon as an example