Zanzibar Coral Shrimp
Stenopus zanzibaricus
A small, striking marine shrimp with a golden body and red-and-white banded claws, acting as a reef cleaner. Geographical Origin and Habitat: This species is native to the tropical...
Température de l’eau
22 - 28 °C
Valeur du pH
8.1 - 8.4
Type d'eau
Marin
Type d'invertébré
Marine shrimp
Taille adulte
3 cm
Groupe minimal
>= 1
Rôle écologique
Symbiont
Sensibilité au cuivre
High
Description de l'espèce
Geographical Origin and Habitat: This species is native to the tropical Indo-West Pacific, with records in East Africa (specifically Zanzibar), the Red Sea, Indonesia, and the Philippines. It inhabits warm coral reefs, rocky crevices, and shallow marine caves from depths of a few meters down to 30 meters, avoiding direct sunlight.
Taxonomy: A member of the family Stenopodidae and the genus Stenopus. Although it closely resembles the larger and more common *Stenopus hispidus*, it is distinguished taxonomically and morphologically by its smaller size and distinct golden coloration on its carapace. No subspecies are recognized.
Social Behavior: Highly territorial, especially toward other members of the genus Stenopus. They usually live in stable, monogamous pairs that cooperate to defend their territory and clean host fish. They establish permanent cleaning stations on reef structures, advertising their services by waving their long white antennae.
Coloration and Sexual Dimorphism: The body features a bright golden-yellow background color. The abdomen and the large, prominent claws are decorated with alternating red and white bands. The antennae are solid white and exceptionally long. Sexual dimorphism is minimal; mature females can be identified by the green egg mass visible under their abdomen.
Soins, reproduction et cohabitation
Tank Setup: Requires a mature marine aquarium of at least 15 gallons (approx. 50-60 liters). The tank must be decorated with plenty of live rock arranged to create overhangs, dark caves, and shaded crevices where the shrimp can hide during the day. A sandy or rubble-strewn substrate is ideal.
Diet and Feeding: An omnivore and detritivore. In captivity, it feeds on leftover fish food, organic detritus, and parasites cleaned from fish. Supplement their diet with high-quality frozen foods like artemia, mysis, small pieces of fresh shrimp or clam, and sinking invertebrate pellets placed near its cave.
Water Quality: Demands stable reef parameters: temperature 24-28°C, pH 8.1-8.4, and specific gravity (SG) 1.021-1.025. Copper-based medications are highly toxic and must never be used. Maintain adequate calcium and iodine levels in the water to support the shedding and reformation of the exoskeleton.
Compatibility and Tankmates: Safe for reef aquariums and corals. Compatible with most small to medium-sized, peaceful reef fish. Do not house with natural predators such as hawkfish, groupers, triggerfish, or large predatory wrasses. Keep only one specimen or a confirmed mated pair per aquarium to prevent lethal fights.
Aquarium Breeding: Mated pairs will spawn frequently in captivity. After the female molts, mating occurs, and she carries the green egg mass under her abdomen. Rearing the resulting planktonic larvae is extremely difficult, as they are easily sucked into filtration systems or consumed by tankmates.
Risks and Diseases: The primary risk is molting failure (dysecdysis), which is usually caused by iodine deficiency, poor water quality, or stress. During the molting process, the shrimp is soft and highly vulnerable to predation. Ensure the aquarium remains stable and free from sudden environmental changes.
Origine et répartition géographiques
This species is native to the tropical Indo-West Pacific, with records in East Africa (specifically Zanzibar), the Red Sea, Indonesia, and the Philippines. It inhabits warm coral reefs, rocky crevices, and shallow marine caves from depths of a few meters down to 30 meters, avoiding direct sunlight.
Origine
Océans tropicaux et récifsAfrique et MadagascarAsie du Sud et du Sud-Est
Profil d'invertébré
- Régime alimentaire
- Omnivore
- Stenopus zanzibaricus is primarily an omnivorous scavenger that constantly forages for detritus, biofilm, and leftover food among the substrate. In captivity, their diet should be supplemented with high-quality sinking pellets, frozen mysis, and occasional vegetable matter. A diverse and rich diet ensures robust molting and brilliant coloration.
- Rôle écologique
- Symbiont
- Playing a critical role in the aquatic food web, Stenopus zanzibaricus acts as a macro-detritivore that breaks down organic materials. Their constant scavenging significantly reduces the accumulation of decaying matter, thereby improving overall water quality. In reef or planted tanks, they often act as meticulous cleaners of the aquascape.
- Taille adulte
- 3 cm
- Risque de saut
- Yes
- When startled by a sudden movement, bright light, or aggressive tank mate, Stenopus zanzibaricus possesses a powerful tail-flick reflex that can launch them entirely out of the water. This jumping behavior makes an unsecured aquarium a severe hazard. A tight-fitting lid or mesh top is absolutely mandatory to prevent them from becoming desiccated on the floor.
- Sensibilité aux chocs
- Medium
- Stenopus zanzibaricus is highly susceptible to osmotic shock caused by rapid shifts in specific gravity, temperature, and pH. Sudden changes can compromise their delicate osmoregulatory systems, often leading to immediate fatalities or failed molts. A diligent drip acclimation process taking at least one to two hours is vital for successful introductions.
- Calcium et minéraux
- High
- To successfully regenerate their chitinous exoskeleton during a molt, Stenopus zanzibaricus requires consistent availability of dissolved calcium, magnesium, and trace iodine. Poor mineral content in the water column can result in "white ring of death" or the inability to fully shed their old shell. Regular water changes and appropriate mineral supplementation are essential for their survival.
- Mue
- Yes
- Molting is the most precarious time in the life cycle of Stenopus zanzibaricus, during which it will hide until its new exoskeleton hardens. Aquarists will often find complete, transparent molts in the tank, which should be left in the water as the shrimp will consume it to reclaim lost minerals. Never disturb or force a shrimp out of hiding during this vulnerable phase.
- Reproduction
- Oviparous
- Under optimal water conditions and with plenty of food, Stenopus zanzibaricus can readily breed in captivity. Females can often be seen carrying clutches of eggs (berried) beneath their pleopods until they hatch into miniature shrimp or planktonic larvae. Providing dense moss or hiding spaces greatly increases the survival rate of the offspring.
- Compatibilité et compagnons
- Highly aggressive
- Stenopus zanzibaricus is best kept in dedicated invertebrate setups or alongside small, peaceful nano fish. They are at high risk of predation from cichlids, larger wrasses, hawkfish, and puffers, which will readily hunt them. When kept with appropriate tank mates, they will confidently display their active and engaging behaviors.
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