Dark Bloody Mary shrimp are the highest-grade expression of the Bloody Mary Neocaridina line -- selectively bred past the standard Bloody Mary grade toward the deepest, most opaque, most saturated red that the line produces. Where standard Bloody Mary shrimp carry a vivid red with some transparency in the body tissue, Dark Bloody Mary shrimp carry a denser, more wine-like red that approaches full opacity -- the internal organs are less visible, the colour reads as deeper and richer, and the overall impression of each individual shrimp is of a more saturated, more fully realised version of the red that the Bloody Mary line is known for. The colour difference between standard Bloody Mary and Dark Bloody Mary is significant enough to be immediately apparent when the two grades are placed side by side -- Dark Bloody Mary reads as distinctly darker, more opaque, and more deeply coloured rather than merely a redder version of the same quality. Like all Neocaridina: hardy, beginner friendly, breeds freely in freshwater, and compatible with stable soft-to-moderately-hard water parameters. Safe with all snails. Do not house with other Neocaridina colour variants to avoid cross-breeding.
6.8-7.8pH
6-14GH
2-8KH
65-78FTemperature
What to Expect
Colour, Grading and Behaviour
Opaque wine-red to dark crimson -- distinctly deeper than standard Bloody Mary grade -- the defining quality of Dark Bloody Mary versus standard Bloody Mary is colour opacity and depth. In standard Bloody Mary shrimp the red is vivid and attractive but carries enough transparency that the internal organs are visible and the colour reads as layered rather than solid. In Dark Bloody Mary the colour is dense enough that the red body reads as approaching a solid block of wine-red or dark crimson -- the internal structures are less apparent and the overall colour mass of the shrimp is heavier and more saturated.
Colour deepens further with successive generations in stable conditions -- as with all selectively bred Neocaridina, Dark Bloody Mary colour quality improves with each generation produced in stable, well-maintained parameters. The offspring of a well-conditioned Dark Bloody Mary colony under consistent feeding and water quality will on average be more deeply coloured than the parent generation, and the most intensely coloured individuals from each generation become the breeding stock for the next. Keeping and selecting from the darkest offspring across multiple generations progressively deepens the colour grade of the colony.
Dark substrate dramatically enhances colour visibility -- the wine-red to dark crimson body of Dark Bloody Mary shrimp reads most vividly against dark substrate -- black aquasoil, black sand, or dark gravel -- where the contrast between the deep red body and the dark background makes the colour appear more saturated and more vivid than it does over light or white substrate. On light substrate the same shrimp appears noticeably less intensely coloured despite no change in the animal itself.
Hardy Neocaridina -- broad parameter tolerance, beginner friendly -- Dark Bloody Mary share the robust constitution of all Neocaridina -- tolerating a wider range of parameters, recovering more readily from minor instability, and requiring less precise water chemistry management than Caridina shrimp. The enhanced colour grade does not come with enhanced fragility -- these are selected for colour, not for narrowed parameter tolerance.
Breeds freely in freshwater without intervention -- females carry egg clutches and release fully formed miniature shrimp directly into the tank without any brackish water, separate setup, or hormonal supplementation. Clutch sizes are typically 20-30 eggs carried for 28-35 days at standard Neocaridina temperatures. Dense moss, floating plant cover, and fine biofilm surfaces support shrimplet survival in the first weeks after release.
Do not house with other Neocaridina colour variants -- Neocaridina of different colour variants interbreed freely and offspring revert toward wild-type brown-grey colouration over successive generations. Keep Dark Bloody Mary in a species-only tank or alongside only other same-colour Bloody Mary grade shrimp to maintain colour quality.
How to Set It Up
Getting Started
1Establish stable parameters before shrimp arrive -- run the tank at target parameters -- pH 7.0-7.6, GH 6-8, KH 3-5, temperature 72-75F -- for at least one week before introduction. Test daily to confirm stability. Stable parameters at introduction produce the best acclimation outcome and the most immediate settling behaviour.
2Use dark substrate -- set up the tank with black aquasoil, black sand, or dark-coloured substrate. Dark Bloody Mary colour is most impressive on dark substrate and the investment in colour quality from selective breeding is most visible in a tank that maximises colour contrast.
3Drip acclimate over 45-60 minutes -- float the bag for 15 minutes to temperature-equalise, then drip tank water into the bag at one drop per second for 45-60 minutes before releasing the shrimp. Slow acclimation reduces osmoregulatory stress during the parameter transition period.
4Provide moss, biofilm surfaces, and shrimplet cover from the start -- ensure the tank has established Java Moss, Flame Moss, or similar fine-structure moss before introducing shrimp. An established colony of biofilm-producing bacteria across moss and hardscape surfaces provides the first food for newly released shrimplets without any targeted feeding in the first days after release.
Bonus TipDark Bloody Mary shrimp alongside Painted Fire Red shrimp -- the deepest grade of the Red Cherry line -- in the same planted tank creates the most intense comparison of two distinct red Neocaridina lines simultaneously. Both are deep, opaque reds but with clearly different colour characters: Dark Bloody Mary reads as darker, more wine-toned and cooler in its red; Painted Fire Red reads as warmer, more orange-red and slightly more vivid. The two lines do not interbreed cleanly for display purposes but together on dark substrate they create a two-tone red shrimp display that is among the most impactful achievable in a Neocaridina tank.
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Browse more Neocaridina shrimpPair Dark Bloody Mary with Blue Velvet, Painted Fire Red, or other Neocaridina for a complete colony. Browse our Neocaridina Shrimp collection.
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