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Across 4. A yellow substance found on the floor of the beach. 5. It is a place filled with salt water. 7. You use it to dry off when you get out of the water. 8. It is filled with clorine and you swim in it. 10. An animal thaty can hear using echo location. 12. You use it when scubba diving. 14. A underwater diving machine. 16. Certain crabs live in them and you can collect them. 17. A violent sea creature with sharp teeth. 18. You ride it to get from one side of the river to the other. 19. You can surf on it. 20. An eight armed sea creature. 21. What do you wear in a boat?

Down 1. A humungous mammal that eats krill. 2. They are very healthy to eat and they swim in the ocean. 3. Abbreviation of personal floating device. 5. You wear it when you swim. 6. You wear them over your head when you are swimming. 9. Who watches you and protects you when your at the beach? 11. It is a liquid you drink. 13. A strong current of water that pulls you further into the ocean. 15. Small crustations live in them.