| 100% | MER | 3 | Prefix with "maid" for a mythical sea creature that's half-fish, half-human |
| 68% | MER | 3 | Prefix with "maid" for a mythical sea creature |
| 59% | MER | 3 | Prefix with "maid" for a mythical creature |
| 56% | MER | 3 | Maid prefix for a mythical half-woman/half-fish |
| 54% | MER | 3 | Prefix with "maid" or "man" to mean a mythical sea creature |
| 51% | MERMAID | 7 | Mythical creature with a human body and a fish's tail |
| 43% | UNI | 3 | Prefix with "corn" for a magical one-horned creature |
| 43% | COS | 3 | Prefix with "play" for a roleplaying activity that may involve superhero outfits |
| 43% | MANATEE | 7 | Sea creature that sailors mistook for a mermaid, centuries ago |
| 42% | ODO | 3 | Prefix with "meter" for a device that measures the distance traveled |
| 42% | HYDRAS | 6 | Sea creatures named for a mythical monster |
| 42% | ANEMONE | 7 | Flower that shares its name with a tentacled sea creature |
| 42% | MANTIS | 6 | With 38-Across, underwater creature that's not actually a 38-Across (nor a 36-Across, for that matter) |
| 41% | EEL | 3 | Fish that might be mistaken for a sea snake |
| 41% | UNI | 3 | Prefix with "corn" to mean a mythical one-horned creature |
| 41% | UNI | 3 | Prefix with "corn" to give a one-horned mythical creature |
| 41% | CENTAUR | 7 | Imaginary creature that's half human, half horse |
| 41% | CARP | 4 | Name for a fish that rhymes with "harp" |
| 41% | DISH | 4 | Prefix with "washer" for a household appliance that makes your life easy by cleaning cookware and cutlery! |
| 41% | LODE | 4 | Prefix with "star" to mean a light that guides a ship at sea |
| 40% | ANEMONE | 7 | Flower that shares its name with a sea creature |
| 39% | SPHINX | 6 | Mythical creature with a human head and lion body |
| 39% | SKATE | 5 | Prefix with "board" for a highschooler's popular pastime |
| 39% | MERMAIDS | 8 | Mythical half-human sea creatures |
| 39% | ORCA | 4 | Sea creature that's the mascot for the NHL's Vancouver Canucks |
| 39% | TRI | 3 | Prefix with "cycle" for a little kid's three-wheeler |
| 38% | UNICORN | 7 | Mythical creature that's a national symbol of Scotland |
| 38% | CENTAUR | 7 | Creature that's half-human, half-horse |
| 38% | GOBLIN | 6 | A mythical humanoid creature that causes mischief |
| 38% | AUTO | 4 | Prefix with "biography" for a self-written book on one's life |