| SCHOOLS | Groups of fish, whales or other swimming animals (7) |
| DORSAL | Fin located on the back of a fish, whale or dolphin |
| POD | Group of whales or other marine mammals (3) |
| SCHOOL | A number of fish, whales, etc., swimming together (6) |
| RIDGE | From Old English for "spine, crest" and Dutch for "back", a long narrow hilltop or mountain range; or, the spine of a whale or other animal (5) |
| CALF | A floating growler detached from a glacier/iceberg; a young buffalo, cow, elephant, giraffe, rhino, whale or other vituline specimen; or, old slang for a dolt or hobbledehoy (4) |
| NEKTON | Aquatic free-swimming animals that inhabit the middle depths of a sea (6) |
| TETRAPOD | Tropical fish, whales and a turtle? |
| OTTERS | Swimming animals |
| RORQUAL | Whale or bird I lost alongside river (7) |
| BLUBBER | Whale or seal fat (7) |
| PODS | Social groups of whales or dolphins; or. the cases of peas or vanilla seeds (4) |
| SHOALWISE | Whale is so out of place in large groups of fish |
| CEPHALOPOD | Mushroom ring shining on group of whales - or squid, say? (10) |
| SINGULAR | Remarkable as fish may be, unlike whales or dolphins (8) |
| CALVE | Give birth (of whales or cows) |
| SHOALS | Large groups of fish (6) |
| ORCAS | Whales or crabs culled at intervals (5) |
| JELLYFISH | Free-swimming animal with tentacles (9) |
| SANDBAR | Shoal, but of sediment not a group of fish (7) |
