Family: Atyidae
Blue Bolt Shrimp — a selective-bred morph of Caridina cantonensis with a soft gradient that runs deep sapphire blue over the head into a milky, almost white tail section. Needs soft acidic water at 20-26 °C (pH 5.8-6.8, 3-8 dGH), stable nitrate near zero; breeds in freshwater but slowly, best for dedicated shrimp keepers.
Blue Bolt Shrimp is a high-grade selective-bred morph of Caridina cantonensis, the Hong Kong hill-stream atyid whose famous red-and-white 'Crystal Red' form revolutionized the shrimp hobby after Japanese breeder Hisaaki Suzuki stabilized it in 1996 from bee shrimp × tiger shrimp hybrids. The Blue Bolt Shrimp wears a soft gradient that runs deep sapphire blue over the head into a milky, almost white tail section — prized specimens show a clean band between the two. Like every cantonensis-line shrimp it demands soft, acidic, ultra-stable water: 20-26 °C, pH 5.8-6.8 and 3-8 dGH, ideally over active soil that buffers the chemistry, with nitrate kept near zero through gentle filtration and small, regular water changes. It grows to 2-2.5 cm, grazes biofilm and specialized bee-shrimp foods, and breeds in freshwater — but slowly and sensitively: the female carries only 20-30 eggs, larvae are smaller and slower than neocaridinas, and swings in parameters trigger molting failures. This is a connoisseur's shrimp — dazzling in a dark, mossy tank, but happiest with a keeper who measures rather than guesses.
Not as a first shrimp — they need soft, acidic, very stable water that beginner tanks rarely provide. Start with Neocaridina (cherry or blue dream), then graduate to blue bolts once you can hold parameters steady for months.
Failed molts — the classic bee-shrimp problem. Causes: GH too high or swinging, inadequate minerals in the diet, sudden parameter shifts, or copper exposure. Keep GH stable at 4-6, feed mineral-rich foods, and never use copper medication in a shrimp tank.
3-8 dGH, and more important than the number is that it never swings. Many keepers run 4-6 dGH remineralized RO with active soil buffering, and match every water change to within 0.5 dGH of the tank.
They are peaceful together, but the water needs conflict: cherries prefer neutral, harder water while bolts need it soft and acidic — one side always suffers. Keep separate unless your tap water naturally lands in both ranges.
Judge the head-to-tail transition: dense saturated blue over the head and thorax, a clean sharp boundary, and a pure white tail. Muddy gradients, grey tones or blue bleeding into the tail lower the grade. Breed your crispest adults to improve the line.