Reports

Thermal Reinforcement and Thermoregulatory Behavior in the Goldfish, Carassius auratus

Science  29 Sep 1961:
Vol. 134, Issue 3483, pp. 942-943
DOI: 10.1126/science.134.3483.942

Abstract

Goldfish in a warm environment can cause a small drop in the temperature of their environment by pressing a lever. The fish regulate the temperature of their environment, keeping the temperature between 33.5° and 36.5°C most of the time.