Sea Apples are a round sea cucumber of the genus Pseudocolochirus. The Sea Apple comes in a variety of colours, but the feet are always green and the mouth area is generally blue or violet. This has led to it sometimes being referred to as the Violet Sea Apple. They have oral tentacles that they will extend into the current when feeding. It is important that they are not kept with any fish that may nip at the tentacles. It is also very important that all powerhead intakes are protected in order to prevent the Sea Apple from being sucked into them.
Sea Apples are native to the Indo-Pacific region and are found on hard surfaces such as coral reefs. Because they are filter feeders they are generally found in areas with high currents. They can be found as deep as 40 feet. In a home aquarium they should be placed in an area of high flow, but they are capable of moving around until they find a suitable location. Sea Apples are filter feeders and so require a mature aquarium with ample microfauna. When feeding they extend their oral tentacles to filter food from the water column. They can also be spot fed food designed for filter feeders if desired. This invertebrate is truly the definition of beautiful but dangerous. As long as it can be protected from powerheads and fish that may nip at it, the Sea Apple’s gorgeous contrasting colours make it a showpiece addition to a reef tank.