- Dolphin (many of the approximately eighty species)
- Chimpanzee (two species)
- Baboon (seven species, including drill and mandrill)
- Gibbon (seven species)
- Monkey (many species, especially the macaques, the patas, and the Celebes black ape)
- Smaller-toothed whale (several species, especially killer whale
Humans are the most intelligent animals, by far.
Dolphins, Great Apes, Elephants, Parrots, and Crows are about tied for second place.
Dolphins or a Monkey