While snorkeling in the Red Sea near Hurghada, Egypt, an underwater photographer captured absolutely beautiful footage of a Chromodoris quadricolor, more colloquially known as a pyjama slug.
This particular dorid nudibranch is so named due to its distinctive pattern of four specific colors.
Chromodoris quadricolor is a species of very colourful sea slug, a dorid nudibranch, a marine opisthobranch gastropod mollusk. The specific epithet quadricolor means four-coloured, so-named because this nudibranch is yellow, white, blue, and black in colour
Here are some other examples of the species.