Marine gastropods are a dietarily diverse taxonomic group;
different species feed on detritus, algae, coral or other sedentary
or active animals. For generalist feeders, finding food
is a minor problem, but for an organism that specializes in
only one or very few prey species, finding food is clearly a
life-or-death challenge. The nudibranch gastropod PhestiIIQ
sibogae is such a specialist. Adults of P. sibogae feed exclusively
on corals of the genus Purites (19), and larvae of the
nudibranch are known to settle and metamorphose as a speciric
response to Potites spp. (l&19).