Common name: pacific clown anemone shrimp

General information

The Harlequin Shrimp, scientifically known as Periclimenes brevicarpalis, is a captivating and colorful addition to the marine aquarium. This species is renowned for its striking appearance, featuring a white body with large blue or purple spots. The Harlequin Shrimp is relatively small, typically reaching up to 5 centimeters in length, and is found in the tropical waters of the Indo-Pacific region.

Care

Harlequin Shrimps require a specialized diet, primarily feeding on starfish, including the Asterina species which are often considered pests in reef aquariums. They are sensitive to water quality and require a well-established aquarium with stable parameters. Providing plenty of hiding places and a sandy substrate can help mimic their natural environment.

Reproduction

This species is known for its monogamous pairing and elaborate mating rituals. The male and female work together to flip over a starfish, feeding on its tube feet and soft undersides. Breeding in captivity can be achieved, but raising the larvae to adulthood is challenging and requires a separate rearing tank with appropriate food sources.

Symbiosis

While not involved in the classic symbiotic relationships seen with anemones or corals, Harlequin Shrimps have a unique predatory relationship with starfish. This interaction can be beneficial in controlling pest starfish populations in the aquarium.

Habitat

Periclimenes brevicarpalis is typically found in coral reefs and rocky substrates, often under ledges or within crevices. They are usually observed in pairs and can be found at depths ranging from the intertidal zone to deeper waters.