Advanced Ocean-themed Crossword Puzzle
 
Listed Items
- 1.  A sea creature with the ability to swell up its body to look bigger
- 2.  Large marine mammal that may have a dorsal fin and a long, streamlined body
- 3.  The periodic change in the level of the sea
- 4.  A species of flattened, burrowing sea urchin
- 5.  A type of sea life made up of tiny polyps which secrete a hard calcium carbonate exoskeleton
- 5.  A creature that lives in the ocean and is related to the lobster
- 6.  Underwater creature that has a diamond-shaped body and a venomous spine
- 7.  Marine invertebrate with five arms and lives on the sea floor
- 8.  Aquatic animal with a bell-shaped body and tentacles
- 9.  Animal with a large head and eight long arms covered in suction cups
- 10. Marine mammal often seen leaping above the surface of the water
- 11. A fish with a snake-like body and no bones
- 12. A large, marine crustacean with a hard, spiny shell and two claws
- 13. Small, shrimp-like crustaceans found in the ocean
- 14. A type of shellfish with a long, thin body
- 15. The submerged edge of a rock or sandbar that is exposed at low tide
- 16. Aquatic predator with a cartilaginous skeleton and multiple rows of sharp teeth
- 17. A creature that lives in the ocean, has a head like a horse, and a curled tail
- 18. A large body of water that is completely surrounded by land
- 19. Organism with scales, fins, and a lateral line