Across

1. 4noun A big fish with many sharp teeth. (5)
2. 5noun The rise and fall of the sea level. (4)
3. 6noun Tiny sea animals that build reefs. (5)
4. 10noun A soft, transparent sea animal that can sting. (9)
5. 11adjective Related to the sea. (6)
6. 13adjective Going far down from the surface. (4)
7. 14verb To stay on the surface of the water. (5)

Down

1. 1noun The hard outer cover of a snail or a crab. (5)
2. 2adjective Tasting like seawater. (5)
3. 3verb To travel to another place every season. (7)
4. 4noun A ship that travels under the water. (9)
5. 7noun Tiny living things that drift in the ocean. (8)
6. 8noun The largest animal on Earth. (5)
7. 9noun A sea animal with eight arms. (7)
8. 12noun A ridge of coral near the surface of the sea. (4)
9. 13verb To jump head first into the water. (4)