Berthellina [Berthellina]

Description

Berthellina is a genus of soft-bodied, shell-less marine gastropods in the family Aglajidae. These nudibranchs are characterized by their smooth, elongated bodies and a uniform coloration that can range from bright yellow to pink or purple. They are found in a variety of marine environments, often under rocks or within coral reefs where they feed on sponge and detritus. Despite their striking appearance, they are not commonly observed due to their reclusive habits.