Common name: Harlequin's sweetlips

General information

The Harlequin Sweetlips, Plectorhinchus chaetodonoides, is a striking and popular fish in the saltwater aquarium trade. Known for its distinctive juvenile pattern of black spots on a white background, which gradually changes to a more muted pattern of brown or grey with age, this species is a favorite among aquarists for its unique appearance and behavior.

Juveniles exhibit a mesmerizing swimming pattern that mimics a piece of drifting debris, which is thought to be a defense mechanism against predators. As they mature, their swimming style becomes more typical of larger fish.

Care

Harlequin Sweetlips can grow quite large, reaching up to 72 centimeters in length, and require a spacious tank to accommodate their size. They are generally peaceful but may eat smaller fish and invertebrates, so tankmates should be chosen with care. A varied diet of meaty foods such as shrimp, squid, and fish flesh is essential for their health.

Reproduction

In the wild, Harlequin Sweetlips are known to form spawning aggregations, but breeding in captivity is rare. Little is known about their reproductive habits in home aquariums.

Habitat

Native to the Indo-Pacific region, Harlequin Sweetlips are found in coral-rich areas of lagoons and outer reefs, often hiding in caves or under ledges during the day. They are nocturnal and venture out at night to feed.

Geographical distribution includes areas from the Red Sea and East Africa to the Central Pacific, with sightings as far south as northern Australia and as far north as southern Japan.