Common name: Harlequin Shrimp

General information

The Harlequin Shrimp, scientifically known as Laomenes cornutus, is a captivating and colorful species that adds a touch of drama to any reef aquarium. Known for their striking appearance, these shrimp feature a white body with large, bright blue spots and ornate, horn-like appendages on their carapace, giving them a unique and exotic look.

Harlequin Shrimp are known for their specialized diet, primarily feeding on starfish, including the troublesome crown-of-thorns starfish (Acanthaster planci), which makes them not only beautiful but also beneficial for natural pest control in the reef aquarium.

Care

Caring for Harlequin Shrimp can be challenging due to their specific dietary needs. They require a steady supply of starfish to thrive, which can be difficult and costly to maintain. A well-established reef tank with plenty of hiding places and a stable environment is crucial for their well-being. It's important to note that these shrimp should only be introduced to mature aquariums.

Reproduction

Harlequin Shrimp are known to form monogamous pairs, and breeding in captivity is possible. The female carries the eggs under her abdomen until they hatch, releasing miniature versions of the adults. Breeding these shrimp requires a separate rearing tank and a consistent supply of starfish larvae for the offspring to feed on.

Symbiosis

While not involved in symbiosis like clownfish and anemones, Harlequin Shrimp have an interesting ecological role as predators of starfish, which can help control starfish populations in the reef.

Habitat

Laomenes cornutus is typically found in the Indo-Pacific region, from the shallow waters of coral reefs to deeper rocky substrates. They are often observed under ledges or within crevices, where they can ambush their starfish prey.