| crab(noun, water, sea, ocean) |
| creature(noun, animal, fish) |
| critter(noun, animal, creature, fish) |
| croc(noun, animal, creature, fish) |
| crocodile(noun, animal, creature, fish) |
| crocs(noun, animal, creature, fish) |
| currents(noun, water, sea, ocean) |
| diatoms(noun, water, sea, ocean) |
| dingo(noun, animal, creature, fish) |
| dogfish(noun, water, sea, ocean) |
| dorsal fin(noun, animal, creature, fish) |
| dugong(noun, water, sea, ocean) |
| dugongs(noun, animal, creature, fish) |
| ebb tide(noun, water, sea, ocean) |
| eel(noun, water, sea, ocean) |
| elephant seal(noun, water, sea, ocean) |
| euphotic zone(noun, water, sea, ocean) |
| fin(noun, water, sea, ocean) |
| finback(noun, animal, creature, fish) |
| finless(noun, animal, creature, fish) |