| Rating | Solver | Clue |
|---|---|---|
| ORCA | Marine mammal | |
| DUGONG | Marine mammal | |
| CETACEAN | Marine mammal | |
| OTARY | Marine mammal | |
| OTTER | Marine mammal | |
| WHALE | Marine mammal | |
| SEAL | Marine mammal | |
| DOLPHIN | Marine mammal | |
| MANATEE | Marine mammal | |
| WALRUS | Large marine mammal | |
| CONCEAL | Trick marine mammal, say, to get hide | |
| SEA LANE | Shipping route for marine mammal with a pair of directions | |
| SEA BEAST | Any large marine mammal, as a seal, walrus, or cetacean. | |