w
| COMMON NAME | U.S. Stock | California | Specific |
| California sea lion | 161,066-181,355 4 | 7,000-Año Nuevo | |
| Steller sea lion | 1,764 11 | ||
| northern fur seal | 25,000-30,000 5 | ||
| northern elephant seal | 73,500 4* | 4,900 -Año Nuevo Island 12 | |
| Pacific harbor seal | 34,554 4* | 2,300-Pfeiffer Pt. to Año Nuevo 9 | |
| blue whale | 2,134 4* | ||
| fin whale | 49-935 9,3 | ||
| minke whale | 73-526 9,3 | ||
| humpback whale | 597 4* | ||
| gray whale | 21,600 6 | ||
| northern right whale | 16 9 | ||
| sperm whale | 756-892 3,9 | ||
| beaked whales | 392-3,500 9,3 | ||
| killer whale | 307 3 | ||
| Pacific white-sided dolphin | 121,693 9 | ||
| Risso's dolphin | 32,376 9 | ||
| northern right whale dolphin | 21,332 9 | ||
| short-beaked common dolphin | 225,821 3 | ||
| long-beaked common dolphin | 9,472 3 | ||
| bottlenose dolphin | 2,382 8 | 245 8 | 40-45 7 |
| Dall's porpoise | 78,422 3 | ||
| harbor porpoise | 13,370 2 | ||
| sea otter | 2,377 1 |