Neon Sea Slug, Thecacera picta, Triton Bay, West Papua, Indonesia

A very small (2-3mm) nudibranch in its natural habitat, Tulamben, Bali, Indonesia.

A Nembrotha cristata nudibranch crawls over a tunicate.

Cyerce elegans is one of the beautiful butterfly nudibranchs found in the Philippines, Anilao, Philippines.

A pair of vibrant nudibranchs, Nembrotha kubaryana, mate on a coral reef in the remote, tropical islands of Raja Ampat, Indonesia.

Polycerid nudibranch, Nembrotha cristata, external gill detail, Puerto Galera, Mindoro, Philippines..