Common name: Celestial Phyllidia

General information

The Blue Dragon Nudibranch, scientifically known as Phyllidia coelestis, is a strikingly colorful sea slug that is popular among marine enthusiasts. This species is part of the Phyllidiidae family and is known for its vibrant blue and black coloration with yellow ridges. Nudibranchs are renowned for their diverse and often brilliant colors and patterns, and Phyllidia coelestis is no exception, making it a prized specimen for photographers and aquarists alike.

Care

Caring for Phyllidia coelestis in a reef aquarium requires attention to water quality and diet. They are sensitive to high levels of nitrates and phosphates, so maintaining pristine water conditions is crucial. They feed exclusively on sponges, which means they require a specialized diet that can be challenging to provide in captivity. It's essential to research and secure a sustainable food source before adding them to your tank.

Reproduction

Like many nudibranchs, Phyllidia coelestis is a hermaphrodite, possessing both male and female reproductive organs. They can lay masses of eggs, which hatch into free-swimming larvae. These larvae eventually settle and metamorphose into the adult form. Reproduction in captivity is rare, but with optimal conditions, it is possible to observe their unique mating and egg-laying behaviors.

Habitat

Phyllidia coelestis is typically found in the tropical Indo-Pacific region, from the Red Sea to the central Pacific. They inhabit coral reefs and prefer to dwell on or near their sponge food sources. In the wild, they can be found at various depths, often on reef slopes where sponges are abundant.