Across
- 4. burrows into the ground when the pond it lives in dries up
- 8. bony fish have these to help them move through the water
- 11. kind of ecosystem for fish found in an estuary
- 13. jawless fish that can latch onto another fish and suck its blood
- 15. bony fish have these to pass in oxygen and pass out carbon dioxide
- 16. swims "standing up" and can grasp things with its tail
- 17. cartilaginous fish that can be seen "flying" through the water
- 18. anadromous fish born in fresh water but spends its adult life in salt water
- 19. ocean zone without enough light for photosynthesis
- 21. nearly blind jawless fish that is coated with slime
- 22. the largest fish in the world
- 23. bony fish have these layered like a roof to protect the skin
Down
- 1. has pectoral fins and can leap out of the water and glide
- 2. ocean zone just beyond the waves in which sunlight reaches most of the water
- 3. uses sacs to store water which allows them to live mostly out of water
- 5. cartilaginous fish with plates for grinding
- 6. a chemical production of light from the bodies of creatures
- 7. the most aggressive of its kind and most dangerous to humans
- 9. snakelike fish with one species being literally electric
- 10. fish born in salt water but spend their adult lives in fresh water
- 12. ocean zone closest to the shore
- 14. ocean zone closest to the surface
- 15. family pet
- 20. bony fish have these to provide structure