Across
- 1. Dirty waste that harms the sea
- 4. A large sea predator with sharp teeth
- 6. The large body of salt water on Earth
- 8. A plant that grows in the sea
- 9. Not dirty
Down
- 2. A sea animal with a hard shell
- 3. To keep something safe
- 4. A sea mammal that can swim and live on land
- 5. A place in the ocean where many corals grow
- 7. A colourful structure in the sea made by tiny animals