| DOLPHIN | This marine mammal group, which also includes killer whales and the pilot whales, shares its common name with a fish, which is also known as the mahimahi. (7) |
| IBIS | Any of various long-legged wading birds of the family Threskiornithidaey, which also includes the spoonbills (4) |
| POOL | Cue sport whose variations include killer and rotation (4) |
| BASS | This fish shares its common name with the lowest-pitched member of the violin musical instrument family. |
| WHALE | To which marine mammal group does the dolphin belong (5) |
| POD | Marine mammal group |
| FINCH | A serin, siskin or other oscine that shares its common name in question with the surname of Atticus in Harper Lee's To Kill a Mockingbird (5) |
| CETACEAN | A member of the order of aquatic mammals that includes the toothed whales and the baleen whales |
| CETACEA | Order of marine mammals comprising the Mysticeti (whales) and the Odontoceti (dolphins and porpoises) (7) |
| ORCAS | They're larger than pilot whales |
| BULBOUS | like a pilot whale's head |
| ORCA | Pilot whale's cousin |
| SONAR | Echolocation used by whales and the mammals mentioned in 20 Across (5) |
| DUGONG | This marine mammal inhabits the warm coastal waters of the Indian and Pacific oceans and feeds on seagrasses; it is similar to the American manatee. (6) |
| VAQUITA | Found only near the northern end of the Gulf of California, ecologists had estimated that, by 2020, no more than 18 adults of this marine mammal species remained. (7) |
| NEW | ___ Caledonia, which is the largest island in a French South Pacific possession that also includes the Loyalty Islands, the Belep Islands, and the Ile des Pins. |
| HABITAT | The ocean for the blue whale and the great white shark |
| BRASSICA | Latin word for cabbage and thus the genus that also includes its relatives broccoli, cauliflower and mustard (8) |
| MANATEE | This marine mammal makes me a neat anagram (7) |
| PILLOW | Heat from pilot whale typically found on top of the bed (6) |
