| Porpoises | 9 |
| European coastal plant once thought to be an aphrodisiac | 56 |
| Fish that swims upright | 23 |
| Fish that swims in an upright position | 38 |
| Fish with a prehensile tail | 27 |
| Underwater creature whose males give birth | 42 |
| Prehensile-tailed fish | 22 |
| Pipefish's kin | 18 |
| Nereid's steed | 18 |
| Mount for the god Neptune | 25 |
| Large whitecap | 14 |
| It's not an equine | 22 |
| Hippocampus of myth | 19 |
| Hippocampus hippocampus, e.g. | 29 |
| Hippocampus | 11 |
| Fish with a long neck | 21 |
| Fish whose male carries the eggs | 32 |
| Fish that sings when mating | 27 |
| Fish of which the male carries the fertilized eggs | 50 |
| Fabled marine creature | 22 |
| Equine-looking fish | 19 |
| Cousin of a stickleback | 23 |
| Coral reef inhabitant | 21 |
| Animal-like fish | 16 |
| Upright swimmers | 16 |
| Misnamed marine fish | 20 |
| Marine equines? | 15 |
| Old TV series with underwater scenes | 36 |
| Lloyd Bridges TV series | 23 |
| Old TV series with a scuba-diving hero | 38 |
| Old Lloyd Bridges TV series | 27 |
| Old Lloyd Bridges series | 24 |
| Lloyd Bridges TV show | 21 |
| Gulf of Bothnia winter phenomenon | 33 |
| It's gradually shrinking in the Arctic | 42 |
| Endangered Arctic presence | 26 |
| Common polar surface | 20 |
| It's said to be salubrious | 30 |
| "And why the ___ boiling hot" | 39 |
| Potted maritime plant | 21 |
| Fleshy plant of the mustard family | 34 |
| European potted plant | 21 |
| European coastal plant | 22 |
| Coastal plant with collard-like leaves | 38 |
| Coastal plant with cabbage-like leaves | 38 |
| Coastal plant of the crucifer family | 36 |
| Coastal plant | 13 |
| Ocean-going vessel | 18 |
| Beach lounger | 13 |
| Signet | 6 |
| Official stamp | 14 |
| Close securely | 14 |
| Barking beast | 13 |
| Circus barker | 13 |
| Tamperer hamperer | 17 |
| Notarization proof | 18 |
| Diploma feature | 15 |
| Close hermetically | 18 |
| Secure against leakage | 22 |
| Notary's tool | 17 |
| Close, as an envelope | 21 |
| Close up tightly | 16 |
| Whiskered clapper | 17 |
| Navy commando | 13 |
| It has a ball at the circus | 27 |
| Ball balancer | 13 |
| Close up tight | 14 |
| Circus animal | 13 |
| Team Six member | 15 |
| Gummed flap | 11 |
| Flippered mammal | 16 |
| Close tight | 11 |
| Clapping animal | 15 |
| Circus horn honker | 18 |
| Circus barker? | 14 |
| "Kiss From a Rose" singer | 35 |
| ___ of approval | 15 |
| Whiskered animal | 16 |
| Stamp of approval | 17 |
| Royal's emblem | 18 |
| Prepare to mail | 15 |
| Playful pinniped | 16 |
| Pinniped | 8 |
| Phocid | 6 |
| Official impression | 19 |
| It makes quite an impression | 28 |
| Close an envelope | 17 |
| Caulk | 5 |
| Beach ball balancer | 19 |
| Walrus' cousin | 18 |
| Symbol of approval | 18 |
| Shut tightly | 12 |
| Shut securely | 13 |
| Organizational symbol, perhaps | 30 |
| Organizational symbol | 21 |
| Notary's need | 17 |
| Notary's mark | 17 |
| Naval commando | 14 |
| Heidi Klum's husband | 24 |
| Freshness safeguard | 19 |