Across
- 3. ocean's highway
- 4. the darkest depths of the ocean
- 5. colorful organism, making up a reef
- 7. clingy and crusty shell-dweller
- 9. bobbing sea marker
- 12. whale food
- 13. a stinging sea flower
- 15. echolocating acrobat
Down
- 1. underwater coral city
- 2. escape artist with eight limbs
- 4. pond scum
- 6. drifting marine organisms
- 8. brown algae with buoyancy
- 10. black and white apex predator
- 11. ebb and flow influenced by the moon
- 14. unicorn of the sea