GO FISH
FISH: a vertebrate that lives in water and uses fins to move Domain: Eukarya Kingdom: Animalia Phylum: Chordata (Chordates) 3 Classes of Fish
All Fish … Have Fins Breathe with gills Live their entire life in water Most have scales Are Cold-blooded (ectotherm)
The 3 Classes of Fish are Jawless Cartilage Bony
First fish were jawless: They were restricted to sucking and scraping for food Once jaws evolved fish were able to bite and chew
Jawless Fish Lampreys and hagfish are the only two jawless fish. Characteristics of Jawless fish: Long and snake like No proper skull Skin is tough and slimy with no scales No jaw Cartilage skeleton
Cartilage Vs. Bone Skeletons Cartilage is rubbery and flexible Bone is hard and rigid
Hagfish
A Lamprey’s Mouth
Lamprey
Cartilage Fish Sharks, rays, and skates Characteristics Skeleton made of cartilage Sharks have tiny scales called denticles Have proper jaws and skulls Shark Denticles
Sharks
Skate
Sting Ray
Bony Fish Characteristics Skeleton made of bone 95% of all fish are bony Streamlined bodies Covered with scales Swim bladder to navigate depth in water
A sea horse is a bony fish.
Salmon