Trapania vitta

Trapania vitta is a dorid nudibranch characterized by its opaque white body. The rhinophores feature orange tips, and each of the three gill stalks has a stripe extending from the base to the tip. The lateral papillae are entirely white, while the oral tentacles are orange, often accompanied by an orange line that runs from the tail towards the gills. This species can be distinguished from Trapania aurata, which has striped orange lateral papillae, and from Trapania gibbera, which has more pigmented gill leaves. Trapania vitta was first described from Bali, Indonesia, and has been recorded in various locations including Luzon in the Philippines, Queensland, East Timor, Vanuatu, and New Caledonia, typically inhabiting shallow waters less than 40 meters deep. This nudibranch likely feeds on Entoprocta, small organisms commonly found growing on sponges and other living substrates. Members of the Nudibranchia order are simultaneous hermaphrodites, engaging in a unique mating behavior where individuals dart their reproductive organs toward each other, determining dominance in the mating process. Eggs are laid on a substrate, where they develop into a planktonic larval stage before maturing into adults. Diving encounters with Trapania vitta can be intriguing, as divers may spot these nudibranchs on sponges or rocky surfaces within their tropical habitats. Their distinct coloration and patterns make them an interesting find for underwater photographers and marine enthusiasts alike. The conservation status of this species has not been evaluated by the IUCN.