Overview
The Blue Jelly Shrimp (Neocaridina davidi var. Blue Jelly) is a highly sought-after freshwater dwarf shrimp known for its clear, icy-blue appearance. Unlike the deep, opaque blue of the Blue Dream shrimp, the Blue Jelly boasts a translucent coloration that resembles blue gelatin, giving it a unique and delicate look. Originating from the careful selective breeding of Blue Rili shrimp—where the red patches were bred out to leave only the transparent blue body—these shrimp are as hardy as they are beautiful. They make excellent cleanup crews for nano tanks and planted aquariums.
Distribution and Habitat
While the wild type of Neocaridina davidi is native to the freshwater streams and ponds of Taiwan and parts of China, the Blue Jelly Shrimp does not exist in the wild. It is entirely the result of dedicated aquaculture and selective breeding in the aquarium hobby. However, because they share the genetics of their wild ancestors, they thrive in environments that mimic natural, slow-moving streams rich in plant life, leaf litter, and natural biofilm.
Description of Blue Jelly Shrimp
The defining characteristic of the Blue Jelly Shrimp is its stunning translucent blue body. The intensity of the blue can range from a very pale, almost clear ice-blue to a slightly deeper sky blue, but it always retains that signature "jelly-like" transparency. You can often see their internal organs or the food they are digesting. Adult females typically grow to about 1.5 inches and are noticeably larger and rounder in the underbelly than males, who remain slimmer and slightly smaller at around 1 to 1.2 inches.
Keeping and Caring for Blue Jelly Shrimp
Thanks to their Neocaridina lineage, keeping Blue Jelly Shrimp is remarkably easy, making them a fantastic choice for both novice and experienced aquarists. They are highly adaptable to a range of water conditions, provided the environment is stable. A well-cycled tank is absolutely essential before introducing them.
Tank size:
A minimum tank size of 5 gallons is recommended for a small colony of Blue Jelly Shrimp. However, 10 gallons or more is ideal, as larger water volumes are easier to keep stable. Because their bioload is incredibly small, you can comfortably house 5 to 10 shrimp per gallon.
Water Parameters:
Temperature
They prefer temperatures between 65°F and 80°F (18°C - 27°C). While they can tolerate the higher end of this spectrum, keeping them around 72°F is optimal for balancing their metabolism and lifespan.
pH
A pH range of 6.5 to 8.0 is perfectly suitable. They do best in slightly alkaline water, which helps maintain healthy shell development.
Hardness
General Hardness (GH) should be between 4 and 8 dGH, and Carbonate Hardness (KH) between 3 and 15 dKH. Adequate minerals in the water are vital to prevent molting issues.
Ammonia, Nitrite, Nitrate
Ammonia and Nitrite must always be at 0 ppm. Nitrates should be kept as low as possible, ideally below 20 ppm. Regular partial water changes are required to keep these levels in check.
Lighting
Blue Jelly Shrimp do not have specific lighting requirements. Standard aquarium lighting tailored to your live plants will suffice. Moderate lighting will also encourage the growth of natural biofilm and soft green algae for the shrimp to graze on.
Water flow
A gentle water flow is best. Sponge filters are highly recommended because they provide excellent biological filtration, create a soft current, and offer a large surface area for shrimp to forage without the risk of sucking up baby shrimp.
Decorations and Plants
A heavily planted tank is a paradise for Blue Jelly Shrimp. Mosses (like Java Moss or Christmas Moss), floating plants, and fine-leaved stem plants provide excellent hiding spots, especially for vulnerable shrimplets. Adding driftwood and botanical leaf litter (such as Indian Almond leaves) is highly beneficial, as they release tannins and promote biofilm growth.
Adding the Blue Jelly Shrimp
When introducing your Blue Jelly Shrimp to their new home, patience is key. Drip acclimation over 1.5 to 2 hours is highly recommended to gently adjust them to the new temperature and water chemistry. Sudden shifts in parameters can cause shock or trigger premature molting, which can be fatal.
Some Feeding Tips
While they will constantly graze on naturally occurring biofilm and algae, their diet should be supplemented 2-3 times a week. Offer high-quality sinking shrimp pellets, algae wafers, and occasional blanched vegetables like zucchini, spinach, or cucumber. Only feed what they can consume in a few hours, and remove any uneaten food to prevent water fouling.
Dangers of Blue Jelly Shrimp in the Planted Aquarium
There are virtually no dangers to keeping Blue Jelly Shrimp in a planted aquarium. They are entirely peaceful and will not damage healthy plants. They only consume decaying plant matter, making them excellent caretakers of your aquascape. The only "danger" is to the shrimp themselves if they are kept with inappropriate fish or if copper-based plant fertilizers or medications are used, as copper is highly toxic to all invertebrates.
Tank mates & Compatibility
Blue Jelly Shrimp are completely defenseless and should only be kept with peaceful, appropriately sized tank mates. Ideal companions include small nano fish like Otocinclus catfish, Pygmy Corydoras, small rasboras (like Chili Rasboras), and aquatic snails (Nerite, Mystery, or Ramshorn snails). Avoid large, aggressive, or carnivorous fish such as cichlids, goldfish, bettas, or larger tetras, as they will view the shrimp as an expensive snack. A species-only tank is the best way to ensure maximum breeding and survival rates.
Breeding Blue Jelly Shrimp
Breeding Blue Jelly Shrimp is incredibly straightforward. As long as you have a mix of males and females, clean water, and adequate food, they will breed readily in the home aquarium. When a female is ready, she will molt and release pheromones to attract males. Once fertilized, she will carry a clutch of yellow or greenish eggs under her tail (becoming "berried"). She will fan these eggs for about 3 to 4 weeks until they hatch. There is no larval stage; the babies hatch as exact, miniature replicas of the adults. Ensure you have plenty of moss and biofilm for the microscopic shrimplets to feed on.
Conclusion
The Blue Jelly Shrimp is a captivating and low-maintenance addition to any freshwater nano aquarium. Their unique, icy-blue translucence stands out beautifully against dark substrates and lush green plants. Whether you are a beginner looking for your first invertebrate or an experienced breeder wanting to add a delicate splash of color to your collection, the resilient and active Blue Jelly Shrimp is a rewarding choice that brings life and cleanliness to your underwater ecosystem.
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