ONE FISH, TWO FISH, RED FISH, BLUE FISH

Across
3. covering on most fish
5. a type of fish without jaws or paired fins
7.  top fin of fish
10. filters waste from the blood
11.  what a shark skeleton is made of
13.  fins on the sides of fish, used for steering
15.  organ used for buoyancy; swim ___
16.  a baby fish
17.  fish circulation; ___ loop
20.  phylum fish belong to
22.  gill covering
23.  fish that swims from the ocean to river spawning areas

Down
1. oxygen exchange system in fish
2. sends blood to gills, heart chamber
4. "age of fishes"
6. receives blood from body, heart chamber
8. type of fish with thick fins; __-finned fish
9. “cold-blooded”
12.   absorb oxygen from water
14.   brain area used for learning
18.   a famous shark movie
19.   detects vibrations; ___ line system
20.   tail fin
21.   Nemo's forgetful friend