Common name: red-lined jorunna

General information

The Dotted nudibranch (Jorunna rubescens) is a striking sea slug known for its soft, velvety appearance and distinctive spotted pattern. This species belongs to the family Discodorididae and is a popular subject for underwater photographers and marine enthusiasts. Despite their delicate looks, nudibranchs are carnivorous, with Jorunna rubescens feeding primarily on sponges.

Care

Jorunna rubescens requires a specialized aquarium setup that replicates its natural environment. The tank should contain a variety of live sponges, which serve as the nudibranch's main food source. Stable water quality, with consistent salinity and temperature, is crucial for their well-being. Due to their specific dietary needs, they are recommended for experienced aquarists who can ensure a continuous supply of appropriate food.

Reproduction

Nudibranchs, including Jorunna rubescens, are hermaphrodites, possessing both male and female reproductive organs. They can engage in reciprocal mating, where both individuals exchange sperm and lay eggs. The eggs are typically laid in ribbon-like masses and hatch into free-swimming larvae before settling down and transforming into their adult form.

Habitat

Jorunna rubescens is found in the Indo-Pacific region, from the Red Sea and East Africa to the central Pacific. They inhabit coral reefs and rocky substrates, often seen crawling on or near their sponge prey. Their habitat ranges from shallow waters to depths where light still penetrates, allowing for the growth of sponges.