Across
- 2. A large baleen whale known for its complex songs and breaching behavior
- 5. Microscopic marine algae that form the base of the aquatic food web
- 6. The production and emission of light by a living organism
- 7. An animal lacking a backbone such as a jellyfish or a starfish
Down
- 1. A member of the molluscan class including squids octopuses and cuttlefish
- 3. The deep-sea floor where sunlight does not penetrate and pressure is high
- 4. An underwater ecosystem characterized by reef-building corals