GENERAL CHARACTERISTICS They are aquatic animals, both freshwater and

saltwater .

Are ectothermics: body temperature are dependent on having the water.

They can feed in different ways: filter feeders, predators, carnivores…

GENERAL CHARACTERISTICS, II Body adapted to swimming, spindle-shaped and

covered with scales.

They have gills for breathing and heart divided into two chambers, an atrium and a ventricle.

They have separate sexes. Most are oviparous, some ovoviviparous.

Groups:

Jawless fish Cartilaginous Bony fishes

Cartilaginous: Cartilaginous skeleton .

Dermal denticles skin.

Caudal fin with unequal lobes.

Without protection in their gill opening.

Includes: sharks, rays ...

Bony fishes: Skeleton bone.

Scaly skin.

Caudal fin with equal lobes.

Gills covered by a cap.

Include most of the fish.

Jawless fish No mandibles.

Without even limbs.

Fish were incorrectly considered by their habitat and the shape of your body.

Parts of the fishes

curiosities1) The fish is the only animal that can see infrared and

ultraviolet light

2) A tuna can swim 100 miles in a single day

3) The lungfish can live out of water for three years in a state of suspended animation

4)The blanket has gigantic fins larger than 6 m from the tip of one flap to the other