Olga the Perch

To read even more about the nervous system of the perch, click on the "brain" and "spinal cord" pages of the home page.


Though small fish brains are somewhat complex, inside the tiny mass there are structures that accept and process signals from the nostrils and eyes. In the perch the cerebrum is lacking since it has no grey matter. No grey matter means no cermebrum, and no cerbrum means that there is no center of thought or reason. As all brains, the brain of the perch must maintain homeostasis by not only making sure vital organs work but also by controlling balance in the water. Traveling down the sides of the fish is a lateral lien system of sensory organs. Though the fish brain may be small relative to the size of its body it is essentially a small scale version of a human brain. Some scientists even assert that a fish can sense pain the way humans do.