Figure 3.

Induction of bioluminescence by feeding. (a) Feeding with natural prey induced luminescence only when the prey was originally bioluminescent, as with the hydromedusa Mitrocoma cellularia and the lobate ctenophore Bathocyroe fosteri. Nonluminous prey such as the cydippid ctenophore Hormiphora californensis did not cause nonluminous A. victoria to become bioluminescent. (b) A. victoria fed on the nonluminescent scyphomedusa Aurelia aurita became luminescent only if the prey had been injected with coelenterazine before feeding.