| 100% | OTTER | 5 | Critter that sleeps floating on its back |
| 69% | OTTER | 5 | River animal that might sleep floating on its back |
| 69% | OTTER | 5 | Critter that eats while floating on its back |
| 67% | SEAOTTER | 8 | Animal that sleeps while floating on its back |
| 60% | OTTER | 5 | Playful animal that can float on its back |
| 60% | OTTER | 5 | Semiaquatic mammal that often floats on its back |
| 58% | OTTER | 5 | Playful marine animal that often floats on its back |
| 56% | OTTER | 5 | Animal that eats while floating on its back |
| 56% | OTTER | 5 | Mammal that eats while floating on its back |
| 51% | OTTER | 5 | Web-footed mammal, often seen floating on its back |
| 51% | SEAOTTER | 8 | Cute marine mammal that feeds while floating on its back: 2 wds. |
| 49% | OTTER | 5 | Animal that may swim on its back |
| 47% | OTTER | 5 | Critter that often sleeps holding hands with its mate |
| 44% | SEAOTTERS | 9 | Mammals that float on their backs |
| 42% | OTTERS | 6 | Sea mammals that float on their backs |
| 41% | EURO | 4 | Coin with a map on its back |
| 41% | STEGOSAUR | 9 | Fearsome creature with plates on its back |
| 41% | SILVERBACK | 10 | Gorilla with white hair on its back |
| 41% | IPAD | 4 | Tablet with a fruit on its back |
| 41% | OTTER | 5 | Sea animal often seen on its back |
| 41% | SLOTH | 5 | Critter that sleeps upside down |
| 40% | WITOADFE | 8 | Frog that carries fertilized eggs on its back, literally? |
| 39% | TREEBOA | 7 | Snake with "lightning bolts" on its back |
| 39% | BATS | 4 | Critters that sleep upside down in caves |
| 39% | BAT | 3 | Flying critter that sleeps upside down |
| 39% | NICKEL | 6 | Coin with Monticello on its back |
| 38% | KOALA | 5 | Animal that may carry its baby on its back |
| 38% | SPONGECRAB | 10 | Crustacean that wears another sea creature on its back |
| 37% | TEN | 3 | The U.S. Treasury is on its back |
| 37% | RUASOGETS | 9 | Extinct creature with armored spikes on its back |