Sep 12, 2019
* Fish learn who will feed them and when and where they will be fed.
* Fish, on one test of intelligence, were able to learn faster than primates.
* Fish use tools. Some species of fish use rocks to break open sea urchins. Another species attach their eggs to a leaf or rock so that they can be moved easily
* Fish can identify which of two cards has more dots on it
* Fishes can cooperate with non-verbal communication to coordinate hunting with other species.
* Manta Rays appear to pass the mirror test. They respond when they see themselves in a mirror in a way that is distinct from how they act around other manta rays.