notably among the tilapiines and arowanas. Fry harvesting, getting the brooding fish to open its mouth and release the fry, is important if the fry are to be reared artificially. In the case of endangered species, such as Asian arowana, harvesting may be supervised by an official to certify that the fish farm is a genuine producer of captive-bred fish.

Brood parasites

Some fish have evolved to exploit the mouthbrooding

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