Amano Shrimp
Caridina multidentata
The legendary Amano Shrimp is an active, robust, and voracious consumer of nuisance algae. Perfect for community tanks, it requires a secure, tight-fitting lid.
Temperatura da água
18 - 28 °C
Valor de pH
6.5 - 7.5
Tipo de água
Água doce
Tipo invertebrado
Freshwater shrimp
Tamanho adulto
5 cm
Grupo mínimo
>= 3
GH
6 - 15 dGH
KH
2 - 10 dKH
TDS
150 - 400 ppm
Papel ecológico
Scavenger
Sensibilidade ao cobre
High
Descrição da espécie
Geographical Origin and Habitat: Caridina multidentata (formerly known as Caridina japonica) is native to Japan, Taiwan, and Korea. It inhabits coastal rivers and mountain streams characterized by moderate currents, rocky structures, and dense submerged vegetation. The larval stage requires migration to brackish coastal waters to develop.
Taxonomy: Belonging to the family Atyidae, this is a large and robust dwarf shrimp, with adult females reaching 4-5 cm. The body is translucent-glassy with a pale stripe running down the back and horizontal rows of dark reddish-brown dots or dashes along the sides. Mouthparts are strong and adapted for tearing algae.
Social Behavior: Active, bold, and peaceful. Unlike smaller dwarf shrimp, they are not overly timid and actively scavenge during the day. They are social and should be kept in groups of at least 5-6 specimens to promote cooperative cleaning behavior and reduce stress.
Coloration and Sexual Dimorphism: Body is clear and glassy with light grayish-blue or brown hues. The dark spots on the sides are diagnostic: in males, they are round, separate dots; in mature females, they align into short, broken horizontal stripes. Females are also significantly larger and wider than males.
Cuidado, criação e companheiros de tanque
Tank Setup: A tank of at least 40-50 liters is recommended. Provide driftwoods, rocks, and live plants to encourage natural grazing.
CRITICAL REQUIREMENT: The aquarium must have a tight-fitting lid, as Amano shrimp are expert climbers and will escape through small gaps or filter pipes, leading to dehydration and death.
Diet and Feeding: Renowned for its voracious appetite for algae (filamentous algae, hair algae, diatoms). It does not eat healthy Black Brush Algae (BBA). Supplement their diet with sinking algae wafers, vegetable pellets, blanched vegetables, and flake foods. If starving, they may pick on delicate mosses.
Water Quality: Highly adaptable and hardy: temperature 18-27°C, pH 6.5-8.0, GH 6-20, and KH 3-15. Prefers clean, well-oxygenated water with low nitrates. Regular water changes are recommended. Copper is highly toxic and must be avoided.
Compatibility and Tankmates: Excellent for community tanks. Can be kept with small to medium peaceful fish (e.g. tetras, rasboras, guppies, discus, otocinclus). Avoid housing with large, predatory, or aggressive fish such as adult angelfish, cichlids, puffers, and large catfish.
Aquarium Breeding: Extremely difficult. While females frequently carry hundreds of tiny eggs, the hatched larvae (zoea) are planktonic and require specialized brackish or marine water (30-35 ppt salinity) and micro-algae to develop. They must be transitioned back to freshwater post-metamorphosis.
Risks and Diseases: Climbing out of open-top tanks is the most common cause of loss. Other risks include molting failures caused by poor mineral balance (insufficient calcium/magnesium) and chemical poisoning from copper-based medications or plant pesticides.
Origem e distribuição geográfica
Caridina multidentata (formerly known as Caridina japonica) is native to Japan, Taiwan, and Korea. It inhabits coastal rivers and mountain streams characterized by moderate currents, rocky structures, and dense submerged vegetation. The larval stage requires migration to brackish coastal waters to develop.
Origem
Leste Asiático
Perfil de invertebrados
- Dieta
- Omnivore
- The dietary requirements for Caridina multidentata revolve heavily around their constant grazing on biofilm and algae. In a mature aquarium, they will naturally find a significant portion of their food by foraging across surfaces. However, it is important to supplement their diet with high-quality commercial foods designed specifically for them. Vegetable matter, blanched spinach, or specialized sinking pellets can ensure they receive full nutrition. Providing a varied and balanced diet directly correlates to better coloration, growth rates, and overall vitality.
- Papel ecológico
- Scavenger
- In their natural habitat, Caridina multidentata plays a vital ecological role as part of the clean-up crew. They help maintain the balance of their ecosystem by breaking down decaying organic matter and consuming nuisance algae. This natural behavior translates perfectly into the home aquarium, where they serve as tireless workers keeping the environment pristine. By reducing the buildup of detritus, they indirectly improve water quality and prevent the spread of harmful pathogens. Their constant activity makes them a functional and invaluable addition to any balanced aquatic system.
- Expectativa de vida
- 2-3 years
- Tamanho adulto
- 5 cm
- Risco de salto
- Yes
- Aquarists should be aware that Caridina multidentata has a known tendency for jumping out when startled. This usually happens if water parameters deteriorate, prompting an instinctual escape response to find better conditions. A tight-fitting lid or a custom mesh screen on the aquarium is highly recommended to prevent any dry tragedies. Keeping the water level an inch or two below the rim can also deter escape attempts effectively. If an individual is found outside the tank, returning it quickly to the water might still save it if it hasn't completely dried out.
- Sensibilidade ao choque
- Medium
- It is widely documented that Caridina multidentata is incredibly susceptible to osmotic shock and rapid shifts in water parameters. When introducing them to a new tank, a slow drip acclimation process over several hours is strictly necessary. Sudden fluctuations in temperature, pH, or dissolved solids can lead to immediate stress, failed molts, or death. Aquarists must ensure that top-offs are done slowly and with matched water to maintain stability. Routine water changes should be smaller and more frequent rather than large, sudden replacements.
- Cálcio e minerais
- Medium
- Adequate calcium levels are fundamentally important for the survival and growth of Caridina multidentata. Calcium is the primary building block for their exoskeleton or shell, and a deficiency can lead to fatal structural issues. The water column must have a balanced general hardness (GH) to provide dissolved minerals for absorption. Additionally, offering calcium-enriched foods or specialized mineral supplements can greatly assist their biological needs. Regular testing of the water's mineral content is recommended to ensure they have enough raw materials to thrive.
- Muda
- Regular
- The molting process is the most vulnerable time in the life cycle of Caridina multidentata. During this period, they shed their old exoskeleton to grow, leaving them soft and defenseless for a short window. It is crucial to provide ample hiding spaces, such as dense moss, tubes, or leaf litter, so they can retreat safely. Never remove the discarded molts from the tank, as the invertebrates will consume them to quickly reclaim lost calcium and minerals. A failed molt, often seen as the "ring of death," is typically indicative of mineral imbalances or stress in the aquarium.
- Reprodução
- Impossible (brackish larvae)
- Breeding Caridina multidentata in captivity can be an immensely rewarding experience for dedicated aquarists. Some species breed readily in stable parameters, while others require complex larval transitions through brackish water. Once conditions are optimal, females will generally carry the developing eggs until they hatch. Ensuring a predator-free environment and abundant microscopic food sources, like biofilm or specific larval foods, is essential for high survival rates. Observing the successive generations grow adds a dynamic and fascinating layer to keeping them.
- Compatibilidade e companheiros de tanque
- Peaceful
- When selecting tank mates for Caridina multidentata, extreme caution must be exercised to prevent them from becoming an expensive snack. They should ideally be kept in a species-only tank, or alongside very small, peaceful nano fish that pose no threat. Any fish with a mouth large enough to swallow them will likely try to do so eventually. Bottom-dwelling competitors or overly aggressive feeders might also outcompete them for resources. A thoughtfully planned community prioritizing peaceful coexistence is the key to their long-term thriving.
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