| Type | Name | Heaviest Recorded (lbs) | Heaviest Recorded (kg) |
| Whale | Blue Whale | 418,877 | 189,999.4 |
| Shark | Whale Shark | 47,000 | 21,318 |
| Dolphin | Killer Whale | 22,000 | 9,979 |
| Seal | Southern Elephant Seal | 11,000 | 4,989.5 |
| Crocodile | Saltwater Crocodile | 4,409 | 2,000 |
| Walrus | Pacific Walrus | 4,409 | 2,000 |
| Bear | Polar Bear | 2,209 | 1,002 |
| Stingray | Giant Freshwater Stingray | 1,320 | 600 |
| Big Cat | Siberian Tiger | 1,102.3 | 500 |
| Squid | Colossal Squid | 1,091 | 495 |
