The ability of the cichlid fishes Tilapia rendatti Boulenger, Tilapia sparrmanii A. Smith and Hemihaplochromis (=Pseudocrenilabrus) philander (M. Weber) to enter deep water

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Abstract
It was shown experimentally that at 22°C, adult Tilapia rendalli can descend to a maximum compensation depth of 8.5 m and that Tilapia sparrmanni penetrate to a maximum depth of 15m. Adult Hemihaplochromis philander males can descend to 16m, and females to 26m at 22°C. At 30°C, the rate at which‐pressure compensation occurred and the maximum depth reached was increased. Fry and juveniles were able to penetrate to greater depths and to descend more rapidly than adults.