Description
The Black Galaxy Shrimp (Caridina cf. cantonensis) is a rare and visually captivating freshwater dwarf shrimp prized for its deep black coloration adorned with white or blue galaxy-like speckles, particularly concentrated on the head and back. A high-grade variation within the Taiwan Bee group, this shrimp is a favourite among advanced hobbyists due to its striking appearance and selective breeding origins. Like other Caridina species, it requires pristine water conditions and a stable, mature aquarium to thrive and breed successfully.
Features of the Black Galaxy Shrimp
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Reaches 2.5–3 cm in length
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Deep black body with white or bluish “galaxy” spots on the head and upper carapace
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Highly sensitive to water quality and stability
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Peaceful and non-aggressive; best kept in species-only tanks
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Lifespan of 1.5–2 years with optimal care
The best aquarium size for the Black Galaxy Shrimp
A minimum of 20 litres is acceptable for a small, well-maintained colony, though 40–60 litres is recommended for more stable parameters and successful breeding. Always use a fully cycled tank with consistent temperature and pH control.
Tank Mate Compatibility for the Black Galaxy Shrimp
Due to their small size and sensitivity, these shrimp are best kept in a species-only setup or with very gentle tank mates. Avoid fish or invertebrates that may nip or outcompete them. Suitable companions include:
Diet for the Black Galaxy Shrimp
Omnivorous grazers, Black Galaxy Shrimp require a nutrient-rich, varied diet to support colour and health:
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Shrimp-specific sinking pellets and mineral-rich wafers
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Blanched vegetables (spinach, kale, zucchini)
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Natural biofilm and surface algae
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Occasional protein sources like powdered shrimp food or baby brine shrimp
Feed lightly and remove uneaten food to prevent ammonia spikes.
Aquarium Setup Black Galaxy Shrimp
Aquarium Filtration
Use a sponge filter or canister filter with a pre-filter sponge to prevent shrimp from being drawn in. Filtration must support excellent biological balance with minimal flow.
Aquarium Plants
Mosses (such as Christmas Moss and Bucephalandra) are highly beneficial for biofilm production and shelter. Combine with slow-growing plants and floating species for a balanced, low-light environment.
Aquarium Lighting
Low to moderate lighting is ideal. This enhances the shrimp’s dark coloration while limiting stress and algae overgrowth. LED systems with adjustable intensity work best.
Aquarium Heating
Maintain water temperature between 20°C and 24°C. Stability is essential; use a high-quality, adjustable heater with a digital thermometer.
Aquarium Substrate
Active buffering substrates like ADA Amazonia or SL-Aqua soil are essential to maintain the slightly acidic pH (5.8–6.5) preferred by Caridina shrimp.
Aquarium Decorations
Provide natural decor such as cholla wood, Indian almond leaves, and mineral stones. These elements promote biofilm, enrich water with tannins, and offer hiding spots crucial during moulting and breeding. Avoid any copper-based materials or sharp objects.
