Japonica Shrimp
Behaviour Peaceful, reclusive at first. Effective algae eater considering its size of just a few cm
Max size 4cm
Tank Area All surfaces
Min Tank Size 30cm
Temp Min: 18℃ Max: 27℃
Feeding Scavengers, will usually find enough food in the aquarium but can be supplimented with proprietary foods
Japonica Shrimp
  • Japonica Shrimp - thumbnail
  • Japonica Shrimp - thumbnail

Japonica Shrimp

Caridina multidentata

The Japonica or 'Algae' Shrimp is an absolute blessing to the community aquarium due to its brillant ability to remove virtually any algae type. Because of its small size it must be mixed carefully, avoiding any very nippy fish or predatory species. Having said this, most fish of a peaceful nature, even those large enough to eat the shrimps, will simply ignore the shrimps as they go about their business. Once introduced, these shrimps will often dissapear and become reclusive for a while before gaining confidence in their environment. Japonica Shrimps are a naturally grouping and social species so they must be kept in groups. Larger groups tend to be more confident and will venture out together. The species are a very interesting addition to the aquarium and well reccommended. Although these shrimps will adapt to a wide range of conditions, harder water is preferred. Unlike most other Caridina species, the Japonica Shrimp produces larvae rather than fully formed young. Up to 2000 larvae can be produced at one time but these usually perish in home aquariums. The larvae need to be hatched and raised in brackish water and fed microscopic foods. In the wild the larvae are washed into the sea where they develop and head back into freshwater. Reports of successful breeding in general conditions are likely to have been carried out by misidentified shrimps similar in appearance to C. japonica. As with other shrimps, they are very sensitive to strong medications, especially those containing copper.

Japonica/Algae shrimps add virtually no additional load to an aquarium as they are 'recyclers' of waste. You can add these shrimps to your fish list below without using up your stocking level.

Family Atyidae (Freshwater shrimps) | Synonyms Caridina Japonica | Other names Amano Shrimp, Algae Shrimp, Yamamoto Shrimp, Japanese Shrimp, Japanese Marsh Shrimp | Origin Japan | Breeding Produces larvae, difficult to breed in home aquariums (see main text) | Sexing Females are larger and have a more pronounced spotted/broken line patterning

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