What is a fish?
Cold blooded, water
dwelling animal, which breathes through gills, has a backbone and uses
fins for propulsion.
Modern bony fish
(groupers and snappers)
Primitive
cartilaginous fish (rays and sharks)
Never mistake squids,
crabs, prawns and jellyfish with fish.
Fish have variations
is size, shape, color, behavior and life cycle.
How
does a fish operate? · Propulsion
