The tropical nudibranch Phestillu sibogae feeds exclusively on corals of the genus Porites, which
it locates and recognizes by chemical cues. Morphological and physiological analyses of chemosensory neural
pathways in P. sibogae focussed on two pairs of cephalic tentacles, the rhinophores and the oral tentacles. Two
nerves from each oral tentacle pass directly to the brain, whereas multiple nerves from the rhinophores converge
on paired rhinophoral ganglia that connect to the cerebral ganglia.