Fish tank color: An overview
2021
McLean, Ewen
Tanks offer significant flexibility for aquaculture production. When in an optimally operated water reuse configuration, they enable farming of most, if not all species of fish, in geographically mismatched regions, with escapees becoming less consequential. Runoff of used water too can be more readily controlled, and wastes and by-products more easily handled and remediated. Tank-based aquaculture, therefore, augments the sector's environmental compatibility. Another potential benefit of tanks is that they can be manufactured in a wide variety of colors. Most commercial facilities, however, employ a limited palette; most often accepting green, blue and black. Many studies though, indicate that certain species perform better, in terms of growth and feed conversion, when maintained in alternative colored tanks. Different tank colors also impact larval survival, animal health, apparent levels of stress and even level of aggression. Body color too is strongly influenced by background color and this has significance to consumers of food species that are sold skin-on whole/gutted, and the value of ornamentals. The present contribution reviews the effects that tank color may have on various physiological control and behavioral processes in larval and post-larval fishes.
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