Fish can think now

The mirror test

After several days, the fish settled down and tried odd behaviors in front of the mirror, like swimming upside down, which had not been observed in the species before. Later, some appeared to spend an unusual amount of time in front of the mirror, examining their bodies. Researchers then marked the fish with a brown splotch under the skin, intended to resemble a parasite. Some fish tried to rub the mark off.


Cognition (self-awareness)?

A mirror image is not all that alien to nature. Many animals drinking from ponds see their own reflection in the water.
On land, a mirror may seem like a door into another reality and that would scare the heck out of me too.