Hymenocera elegans Harlequin Shrimp M (4 cm)

Overview

Hymenocera elegans, commonly known as the Harlequin Shrimp, is one of the most eye-catching and specialist marine invertebrates available to aquarists. This M size specimen measures around 4 cm and is prized for its vivid colouration, elegant movement and fascinating natural behaviour. It is a true conversation piece for the marine aquarium, but it is important to note that this species is not a general-purpose cleaner shrimp. In the wild, Harlequin Shrimp are specialised predators of sea stars, and this feeding requirement should be understood before purchase.

When kept correctly, Hymenocera elegans can thrive in a mature marine aquarium with stable water quality and suitable prey. They are generally peaceful towards tank mates, but they are highly predatory towards starfish and should never be housed with ornamental sea stars unless they are intended as food. If you are looking for a truly unusual marine invertebrate with remarkable behaviour, this species is an outstanding choice. We offer fast UK delivery and a live arrival guarantee for added peace of mind.

Care at a Glance

Origin & Natural Habitat

Harlequin Shrimp are found across tropical Indo-Pacific reef environments, including coral rubble zones, lagoons and reef slopes. They typically live in pairs and spend much of their time moving slowly over the substrate and rockwork in search of starfish prey. Their natural habitat is warm, stable and highly oxygenated, with plenty of hiding places among live rock, crevices and coral structures.

This species has evolved a very specialised hunting strategy. Rather than scavenging broadly like many other shrimp, Hymenocera elegans targets sea stars and feeds on the tube feet and soft tissue. This unusual biology makes them fascinating to observe, but it also means they are best suited to experienced marine keepers who can provide the correct diet and understand their needs.

Tank Setup & Water Parameters

A mature marine aquarium with excellent filtration, stable salinity and minimal swings in temperature or pH is essential. Harlequin Shrimp are sensitive to poor water quality and should only be added to an established tank. A fine sand bed is not essential, but plenty of live rock, caves and shaded areas will help them feel secure. Gentle to moderate flow is ideal, as strong turbulent flow can make feeding and movement more difficult.

Because they are often kept as a pair, provide enough space for each shrimp to retreat and forage comfortably. A minimum of 60 litres is suitable for a pair, though larger systems are strongly recommended for long-term stability. Avoid aggressive tank mates that may outcompete them for food or harass them. As with all marine invertebrates, acclimation should be slow and careful to reduce stress.

Water quality targets should remain consistent: temperature 24–27°C, pH 8.1–8.4, and specific gravity around 1.023–1.026. Keep ammonia and nitrite at zero, and nitrate as low as possible. Regular partial water changes, strong protein skimming and careful maintenance will support health and longevity. This species is not ideal for newly set-up aquariums.

Feeding Guide

The most important aspect of keeping Hymenocera elegans is feeding. In nature, these shrimp specialise in eating sea stars, and in captivity they should be offered appropriate starfish prey. Many aquarists use pest or non-display starfish where legally and ethically appropriate, or source suitable frozen marine starfish as food. They may not readily accept standard shrimp foods, pellets or flakes as a complete diet.

Feed sparingly and observe closely. A healthy Harlequin Shrimp will often drag prey to a secure spot and feed over time. Because they can consume a starfish gradually, one prey item may last several days depending on size. Do not rely on general omnivore diets alone, as this can lead to malnutrition. If you are unable to source suitable prey consistently, this species may not be the right choice for your aquarium.

Supplemental feeding is sometimes possible with marine meaty foods, but this should be considered secondary to their natural prey requirements. Always research feeding options before purchase to ensure you can meet the species’ needs long term.

Tank Mates / Compatibility

Harlequin Shrimp are generally peaceful with fish and other invertebrates that are not part of their prey profile. They are best kept with calm reef-safe species that will not nip at them or compete aggressively for food. Suitable companions include small gobies, blennies, clownfish, cardinalfish and other gentle community reef fish. Other peaceful ornamental shrimp may be tolerated, but caution is advised in mixed invertebrate systems.

Never house them with ornamental starfish unless you are prepared for them to be eaten. Avoid large predatory fish, puffers, triggers, hawkfish and wrasses that may harass or prey upon the shrimp. Crabs and aggressive hermits can also be problematic. A species-only setup or a carefully chosen reef community is usually the best approach.

For best results, consider keeping a bonded pair. They are often seen together and may share feeding sites. If you keep only one individual, ensure it has plenty of cover and a reliable food plan.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we understand that specialist marine invertebrates need specialist care. Our Harlequin Shrimp are selected with quality and health in mind, and we aim to provide clear guidance so you can keep them successfully. Every order is backed by our live arrival guarantee, and we offer fast UK delivery to help your livestock arrive promptly and in great condition.

We also know that buying a species like Hymenocera elegans is a commitment. That is why we focus on accurate information, careful packing and customer support to help you make the right choice for your aquarium. If you are ready for one of the most distinctive marine invertebrates in the hobby, the Harlequin Shrimp is a truly unforgettable addition.