Vampire Shrimp
Atya gabonensis
Atya gabonensis is a heavy-bodied filter-feeding shrimp from African and American fast rivers. It demands strong, directed water currents and plenty of rocky hiding spots.
Température de l’eau
24 - 28 °C
Valeur du pH
6.5 - 7.5
Type d'eau
Eau douce
Type d'invertébré
Freshwater shrimp
Taille adulte
14 cm
Groupe minimal
>= 1
GH
6 - 15 dGH
KH
3 - 10 dKH
TDS
150 - 350 ppm
Rôle écologique
Scavenger
Sensibilité au cuivre
High
Description de l'espèce
Geographical Origin and Habitat: Atya gabonensis is native to West Africa (ranging from Senegal to Gabon) and Eastern South America (Venezuela and Brazil). It inhabits fast-flowing coastal rivers and streams with rocky substrates. It spends daylight hours sheltered under submerged logs, rocks, and root complexes, facing upstream to catch food particles in the flow.
Taxonomy: Classified within the Atyidae family, this shrimp is characterized by its heavy build, thick forelegs equipped with fan-like bristles (filter fans), and a thick, ridged exoskeleton that gives it a prehistoric, armored appearance. Adults can grow up to 12-15 cm in length.
Social Behavior: Despite its intimidating name and appearance, it is extremely peaceful and completely harmless to fish and plants since it lacks defensive claws. Mostly nocturnal, it will venture out during the day if shaded resting spots with strong water currents are available, often sharing filtration posts with conspecifics.
Coloration and Sexual Dimorphism: Displaying remarkable color plasticity, individuals can change color after each molt, shifting from cobalt blue, slate gray, and dark brown to creamy white or pinkish-orange. Sexual dimorphism is distinct; adult males possess significantly thicker and spinier third-pair legs compared to females.
Soins, reproduction et cohabitation
Tank Setup: A tank of at least 80-100 liters is required, equipped with powerheads or filter outputs to create a strong, directed water current. Provide plenty of rock caves, PVC pipes, and driftwood structures close to the flow zones so the shrimp can perch securely while filtering.
Diet and Feeding: Obligate filter feeders consuming suspended organic particulate (phytoplankton, zooplankton, micro-algae, detritus). In captivity, they must be fed daily with powdered foods (spirulina, baby shrimp food, crushed flakes) or fine frozen foods (cyclops, rotifers) targeted directly into the water current.
Water Quality: Demands highly oxygenated, pristine water: temperature 22-28°C, pH 6.5-7.8, GH 6-15, and KH 4-10. Ammonia and nitrites must be zero. Adequate calcium and iodine levels are necessary to assist the molting process. Extremely sensitive to copper and other heavy metals.
Compatibility and Tankmates: Perfect for peaceful community aquariums. Excellent tankmates include small fish, dwarf shrimp, and snails. Never keep with aggressive or predatory species such as large cichlids, aggressive barbs, puffers, or crayfish, which could easily kill the shrimp, especially after molting.
Aquarium Breeding: Breeding in a freshwater aquarium is impossible. The species produces small eggs that hatch into primitive marine larvae, requiring brackish and saltwater phases to develop. Once metamophosed into post-larvae, they migrate back into freshwater systems.
Risks and Diseases: Starvation is the leading cause of death in clean, over-filtered tanks without targeted feeding. Other risks include molting failures caused by poor mineral balance and copper poisoning. If they are seen searching the substrate with their fans, it indicates a critical lack of food in the water column.
Origine et répartition géographiques
Atya gabonensis is native to West Africa (ranging from Senegal to Gabon) and Eastern South America (Venezuela and Brazil). It inhabits fast-flowing coastal rivers and streams with rocky substrates. It spends daylight hours sheltered under submerged logs, rocks, and root complexes, facing upstream to catch food particles in the flow.
Origine
Océans tropicaux et récifsAmérique du Sud hors AmazonieAfrique et Madagascar
Profil d'invertébré
- Régime alimentaire
- Filter feeder
- The diet of Atya gabonensis typically reflects its natural foraging behavior as a freshwater filter-feeding shrimp. It thrives on a varied diet that can include specialized commercial foods, naturally occurring biofilm, and appropriately sized organic matter. Providing a balanced nutritional profile ensures robust health, strong coloration, and proper energy levels. Supplemental feeding should be adjusted based on the maturity of the tank and the presence of natural food sources.
- Rôle écologique
- Scavenger
- In its native habitat and the home aquarium, Atya gabonensis plays a vital ecological role. It contributes significantly to the processing of organic waste and the maintenance of a balanced micro-ecosystem. By engaging in natural behaviors like scavenging, grazing, or sifting, it helps prevent the accumulation of detritus. This species is often considered a crucial component of a comprehensive clean-up crew.
- Taille adulte
- 14 cm
- Risque de saut
- Yes
- Despite being aquatic, Atya gabonensis can present a flight or jump risk under certain conditions. Many invertebrates will attempt to climb out of the water if parameters drop off, oxygen is low, or they are harassed by tank mates. A tightly fitting lid or screen top is highly recommended to prevent accidental desiccation. Ensuring ideal water conditions is the best deterrent to escape attempts.
- Sensibilité aux chocs
- High
- Sudden shifts in water parameters can trigger severe osmotic shock in Atya gabonensis. It requires slow, careful acclimation, preferably using the drip method over several hours. Rapid changes in temperature, salinity, or pH can lead to immediate stress, failed molts, or mortality. Maintaining absolute stability in the tank is more important than chasing specific target values.
- Calcium et minéraux
- Very high
- Adequate calcium levels are absolutely essential for the structural integrity and growth of Atya gabonensis. For crustaceans and snails, it facilitates proper shell and exoskeleton development, while for corals, it builds the skeletal structure. Aquarists must regularly monitor calcium concentration alongside alkalinity and magnesium. Supplementation through specialized products or mineral-rich foods may be necessary in depleted systems.
- Mue
- Yes
- If applicable to this species, the molting process is a highly vulnerable period for Atya gabonensis. During this time, the animal will hide while its new exoskeleton hardens, requiring peace and stable water chemistry. The discarded molt should generally be left in the tank, as it provides a valuable source of recycled minerals. A lack of iodine or calcium can lead to fatal molting issues, often referred to as the 'white ring of death'.
- Reproduction
- Impossible (brackish larvae)
- The reproductive strategy of Atya gabonensis can range from simple cloning and fragmentation to complex larval stages requiring varying water conditions. Successful captive breeding often signifies excellent water quality and a well-balanced environment. While some species will readily multiply and populate the tank, others may require specialized rearing setups for the offspring to survive. Researching their specific larval development phase is critical for aquarists aiming to breed them.
- Compatibilité et compagnons
- Peaceful
- When selecting tank mates for Atya gabonensis, cautious planning is imperative to avoid predation or aggressive competition. Small or peaceful invertebrates should not be housed with aggressive fish, loaches, or large crabs that might view them as food. Conversely, some specialized invertebrates form symbiotic relationships that can be highlighted in a community setup. A heavily planted or intricately rock-scaped tank often provides necessary refuges.
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