Common name: sea apple

General information

The Sea Apple, scientifically known as Pseudocolochirus violaceus, is a vibrant and captivating species of sea cucumber found in the marine aquarium trade. This invertebrate is renowned for its striking coloration, typically exhibiting a combination of vivid blues, purples, and reds. The Sea Apple is a filter feeder, using its branched tentacles to capture plankton and other suspended organic particles from the water column.

Care

Sea Apples require a well-established aquarium with stable water conditions and low to moderate water flow. They are sensitive to changes in water quality and can release toxins when stressed or if they die, so careful acclimation and a stable environment are crucial. A mature tank with a fine substrate and plenty of live rock is recommended to provide a natural diet and habitat.

Reproduction

In the wild, Sea Apples reproduce by releasing gametes into the water column, a process known as spawning. In the aquarium, however, reproduction is rare. Hobbyists should be aware that if two Sea Apples spawn at the same time, the concentration of gametes can overwhelm the tank's filtration system and lead to water quality issues.

Symbiosis

While not known for any specific symbiotic relationships like those seen in clownfish and anemones, Sea Apples can contribute to the overall health of a reef tank by filtering the water and reducing nutrient levels.

Habitat

Pseudocolochirus violaceus is typically found in the Indo-Pacific region, from the Red Sea to the Great Barrier Reef. They inhabit reef slopes and lagoons, often attaching themselves to substrates where they can effectively filter feed.