"Forced Swim" Test (also known as the behavioral despair test) is the most commonly used test for assessment of depression in animal models. The test is commonly used to measure the effect of antidepressant drugs on behavior. Features: Handles for convenient carrying, positioning, emptying and cleaning. The Porsolt Arena accommodates top and side camera placement, and is well suited for use with both Mice and Rats. Center drain valve for water level adjustment and initial emptying.