Advanced Ocean-themed Crossword Puzzle
 
Listed Items
- 1.  A small marine fish with a head and neck resembling a horse
- 2.  A creature with an exoskeleton that lives in the ocean
- 3.  A large body of salt water that covers much of the Earth's surface
- 4.  Eight-armed cephalopod with a rounded body and two eyes
- 5.  Large marine mammal that may have a dorsal fin and a long, streamlined body
- 6.  A creature that lives in the ocean and is related to the lobster
- 6.  A type of marine invertebrate that builds a calcium carbonate structure
- 7.  Organism with scales, fins, and a lateral line
- 8.  A fish that can puff up its body to make itself look larger to ward off predators
- 9.  A rocky or coral formation near the surface of the sea that is exposed at low tide
- 10. A small, aquatic creature with a hard exoskeleton
- 11. A species of flattened, burrowing sea urchin
- 12. A slippery fish with a long, serpentine body and no scales
- 13. Marine mammal often seen leaping above the surface of the water
- 14. An abundant source of food for many marine animals, including fish, squid, and whales
- 15. Marine invertebrate with five arms and lives on the sea floor
- 16. Aquatic predator with a cartilaginous skeleton and multiple rows of sharp teeth
- 17. Organism with a sac-like body and no backbone
- 18. The regular motion of the ocean's surface
- 19. Underwater creature that has a diamond-shaped body and a venomous spine