Common name: Ringed chromodoris

General information

The Ringed Chromodoris, Goniobranchus annulatus, is a strikingly colorful nudibranch, a type of sea slug found in tropical reefs. This species is known for its vibrant coloration, typically featuring a white body with purple to black rings and orange to red gills and rhinophores. Nudibranchs are popular among underwater photographers and marine enthusiasts for their unique shapes and vivid patterns.

Care

Goniobranchus annulatus requires a specialized aquarium setup that replicates its natural environment. They are sensitive to water quality and require a stable, mature reef system with excellent water parameters. These nudibranchs feed specifically on certain sponges, so it's crucial to ensure a continuous food source, which can be challenging in a home aquarium.

Reproduction

Like many nudibranchs, Goniobranchus annulatus is a hermaphrodite, possessing both male and female reproductive organs. They can engage in reciprocal mating, where both individuals exchange sperm to fertilize their eggs. The eggs are laid in a spiral ribbon and will hatch into free-swimming larvae before settling down and transforming into their adult form.

Habitat

Goniobranchus annulatus is typically found in the Indo-Pacific region, from the Red Sea to South Africa and east to the central Pacific. They inhabit coral reefs and are often seen on or near their preferred sponge prey. These nudibranchs are benthic creatures, meaning they live on the bottom of the ocean, usually at depths where light penetration is sufficient for their prey sponges to thrive.