User:Cheer li

Dolphins
A dolphin's behavior when sleeping/resting depends on the circumstances and possibly on individual preferences. They can either: 1. swim slowly and surface every now and then for a breath 2. rest at the surface with their blowhole exposed 3. rest on the bottom (in shallow water) and rise to the surface every now and then to breath. '  How smart are dolphins?  '

The short answer to this is that we do not know. There is no reliable method to measure intelligence in humans across cultures, so it is not surprising that comparing humans, dolphins, apes, dogs, etc. is possible.