Cherry Shrimp

The Cherry Shrimp, also known as Red Cherry Shrimp or RCS, is the most popular freshwater aquarium shrimp in the hobby. These small crustaceans are prized for their bright red coloration, peaceful nature, and excellent algae-eating abilities. Originally selectively bred from wild brown Neocaridina shrimp in Taiwan, Cherry Shrimp are now available in a rainbow of color variations. They are prolific breeders, easy to care for, and make excellent additions to planted nano tanks and peaceful community aquariums. Their constant activity as they graze on algae and biofilm adds life and interest to any tank.

Overview: The Red Jewels of Freshwater Aquaria

Cherry Shrimp represent the perfect entry point into the fascinating world of freshwater invertebrates. These tiny crustaceans, scientifically known as Neocaridina davidi, have captured the hearts of aquarists worldwide with their brilliant cherry-red coloration and peaceful demeanor. Originally developed through selective breeding in Taiwan during the early 2000s, these shrimp have become the most widely kept freshwater shrimp species globally.

What makes Cherry Shrimp particularly appealing is their accessibility to beginners while still offering interest for experienced aquarists. They are remarkably hardy, adapt well to various water conditions, and breed readily in home aquariums. Their small size makes them perfect for nano tanks as small as 5 gallons, while their peaceful nature allows them to coexist with appropriate tank mates in larger community setups.

The color variations available have expanded dramatically from the original cherry-red strain. Today, hobbyists can choose from an array of colors including Sakura Red, Fire Red, Bloody Mary, Blue Dream, Blue Velvet, Carbon Black, Chocolate, Orange, Yellow, Green Jade, and Crystal Red variations. This diversity has created an entire sub-hobby of shrimp keeping and selective breeding.

Natural History and Origin

While the bright red Cherry Shrimp we know today is entirely a product of selective breeding, their ancestors came from the wild Neocaridina davidi populations of Taiwan and mainland China. Understanding their natural history helps explain their adaptability and care requirements.

Wild Ancestors

Wild Neocaridina davidi exhibit much more subdued coloration, typically appearing brown, greenish-brown, or transparent with subtle speckling. These wild populations inhabit slow-moving streams, rivers, ponds, and rice paddies throughout their native range. The selective breeding process that created the Cherry Shrimp focused on enhancing the naturally occurring red pigments present in some wild specimens.

The transformation from wild brown shrimp to the brilliant red varieties took several generations of careful selection. Breeders chose the reddest specimens from each generation, gradually intensifying the color until the vibrant Cherry Shrimp we know today was established. This process began in earnest in Taiwan during the late 1990s and early 2000s.

Color Grading System

Cherry Shrimp are graded based on the intensity and coverage of their red coloration:

Cherry Grade: Basic red with transparent patches Sakura Grade: Solid red with minimal transparency Fire Red Grade: Intense solid red throughout the body Bloody Mary Grade: Deep translucent red, almost wine-colored

Higher grades command premium prices and are often the focus of dedicated breeding programs.

Setting Up the Ideal Shrimp Tank

Creating an optimal environment for Cherry Shrimp requires attention to their specific needs as small invertebrates with particular sensitivities.

Tank Size and Specifications

Cherry Shrimp thrive in nano tanks as small as 5 gallons, making them perfect for desktop aquariums and small spaces. However, a 10-gallon tank provides more stable parameters and allows for larger colonies.

Tank Dimensions:

• 5 gallons: Suitable for 10-20 shrimp
• 10 gallons: Ideal for 20-50 shrimp
• 20+ gallons: Supports breeding colonies of 100+ shrimp

The tank should have a secure lid, as shrimp can climb and may escape if given the opportunity. Fine mesh covers work well to prevent escapes while maintaining gas exchange.

Substrate Selection

Substrate choice significantly impacts Cherry Shrimp health and coloration. Dark substrates such as black sand or gravel enhance their red coloration by providing contrast. Natural-colored substrates also work well and may reduce stress compared to bright white options.

Some aquarists use active substrates designed for shrimp keeping, though these are not necessary for Neocaridina species. Standard aquarium gravel or sand works perfectly well as long as it is inert and won’t alter water chemistry dramatically.

Plant Decorations

Live plants are highly beneficial for Cherry Shrimp tanks:

Mosses: Java Moss, Christmas Moss, and Peacock Moss provide excellent grazing surfaces and hiding spots for baby shrimp Fine-leaved plants: Guppy Grass, Hornwort, and Water Sprite offer shelter and biofilm growth Cryptocoryne: Low-growing and provide excellent hiding spots Floating plants: Frogbit, Water Lettuce, and Salvinia reduce lighting intensity and provide surface cover

Plants serve multiple functions in shrimp tanks: they provide food in the form of biofilm and decaying plant matter, offer hiding places for molting and breeding shrimp, and help maintain water quality by absorbing nitrates.

Water Parameters and Maintenance

Cherry Shrimp are adaptable but perform best within specific parameters. Stability is more important than achieving exact numbers.

Temperature Requirements

Maintain water temperature between 65-78°F (18-25.5°C). Cherry Shrimp tolerate cooler temperatures better than many tropical fish, making them suitable for unheated tanks in appropriate climates. However, breeding slows significantly below 70°F.

Higher temperatures in the 72-76°F range promote faster growth and more frequent breeding. Temperatures above 80°F can stress shrimp and reduce their lifespan.

pH and Hardness

Cherry Shrimp prefer slightly alkaline water with the following parameters:

• pH: 6.5-8.0 (optimal range 7.0-7.5)
• GH (General Hardness): 4-14 dGH
• KH (Carbonate Hardness): 3-15 dKH

These parameters provide sufficient minerals for shell development during molting while maintaining pH stability. Cherry Shrimp are more adaptable to harder water than many other dwarf shrimp species.

Water Quality Management

Cherry Shrimp are sensitive to ammonia, nitrite, and high nitrate levels. Maintain:

• Ammonia: 0 ppm
• Nitrite: 0 ppm
• Nitrate: <20 ppm (ideally <10 ppm)

Perform 20-30% water changes weekly or bi-weekly depending on the bioload. Use drip acclimation when adding shrimp to new tanks, as they are sensitive to sudden parameter changes.

Avoid using tap water that contains copper, as this is toxic to shrimp. Many water conditioners neutralize copper and other heavy metals.

Diet and Nutrition

Cherry Shrimp are omnivorous scavengers that constantly graze on biofilm, algae, and detritus. In well-established planted tanks with good lighting, they may find sufficient food naturally.

Natural Food Sources

In established aquariums, Cherry Shrimp feed on:

• Biofilm: The microscopic bacterial and algal layer that coats surfaces
• Algae: Soft algae varieties are readily consumed
• Detritus: Decaying plant matter and organic debris
• Microorganisms: Tiny organisms living in the substrate and on plants

Supplemental Foods

While natural food sources may suffice in mature tanks, supplemental feeding ensures good health and breeding:

Commercial Shrimp Foods:

• Shrimp pellets and wafers
• Algae wafers (cut into small pieces)
• Specialized shrimp diets containing spirulina and calcium

Fresh Foods:

• Blanched spinach, zucchini, cucumber, and carrots
• Small amounts of fish flakes or pellets
• Repashy Gel Foods (Soilent Green variety)

Protein Treats:

• Frozen bloodworms (sparingly)
• Brine shrimp
• Daphnia

Feeding Schedule

Feed small amounts 2-3 times per week in established tanks, or daily in newer setups. Remove uneaten food after 24 hours to prevent water quality issues. Overfeeding is a common cause of shrimp death.

Behavior and Social Structure

Cherry Shrimp exhibit fascinating behaviors that make them engaging to observe despite their small size.

Constant Grazing

Cherry Shrimp spend most of their time grazing on surfaces throughout the tank. They use their specialized mouthparts to scrape biofilm from glass, plants, decorations, and substrate. This constant activity makes them excellent algae controllers for planted tanks.

Molting Behavior

As crustaceans, Cherry Shrimp must shed their exoskeletons to grow. Molting occurs every few weeks in younger shrimp and less frequently in adults. During molting:

• The shrimp becomes less active for 24-48 hours before the molt
• They seek secure hiding places
• The old shell splits and the shrimp backs out
• The new shell is soft and vulnerable for several hours
• The shrimp often eats the old shell to recycle minerals

Never remove molted shells immediately, as shrimp need time to consume them for calcium.

Social Interactions

Cherry Shrimp are peaceful and social, often seen grazing in groups. They do not establish aggressive hierarchies like some other invertebrates. When kept in colonies, they readily breed and produce offspring.

Reproductive Behavior

Female Cherry Shrimp carry eggs under their tails in a structure called the saddle. When ready to breed, they release pheromones that trigger males to seek them out. After mating, females hold 20-30 eggs for approximately 3-4 weeks before they hatch into miniature versions of adults.

Baby shrimp require no special care and will find food in the biofilm of established tanks. Separation from parents is unnecessary unless predatory fish are present.

Compatible Tank Mates

Choosing appropriate tank mates is crucial for Cherry Shrimp success. Any fish large enough to fit a shrimp in its mouth will eventually eat them.

Ideal Tank Mates

Small Peaceful Fish:

• Neon Tetras and Cardinal Tetras (small adults)
• Ember Tetras
• Harlequin Rasboras
• Celestial Pearl Danios
• Endler Guppies (not standard guppies, which may eat shrimplets)

Bottom Dwellers:

• Pygmy Corydoras
• Habrosus Corydoras
• Otocinclus Catfish (excellent companions)

Other Invertebrates:

• Nerite Snails
• Mystery Snails
• Ramshorn Snails
• Malaysian Trumpet Snails
• Other peaceful shrimp (Amano Shrimp, Ghost Shrimp)

Incompatible Tank Mates

Aggressive or Predatory Fish:

• Betta Fish (will hunt and kill shrimp)
• Cichlids of any size
• Goldfish (will eat all shrimp)
• Angelfish
• Gouramis
• Larger Tetras (Serpae, Silver Dollar)
• Barbs (Tiger Barbs, Cherry Barbs)
• Catfish larger than 2 inches

Caution Required:

• Standard Guppies may eat baby shrimp
• Platies and Swordtails may eat shrimplets
• Larger Tetras (Rummy Nose, Emperor) may eat shrimplets

Many aquarists maintain shrimp-only tanks to ensure colony growth and maximum breeding success.

Breeding Cherry Shrimp

One of the most rewarding aspects of Cherry Shrimp keeping is their prolific breeding in appropriate conditions.

Sexing Shrimp

Females:

• Larger and more robust body shape
• Rounder abdomen for carrying eggs
• Often deeper red coloration (in higher grades)
• Visible saddle (yellowish egg mass) behind the head when not carrying eggs

Males:

• Smaller and slimmer
• Less intense coloration
• More active swimmers
• No saddle visible

Breeding Process

When conditions are favorable, breeding occurs naturally without intervention:

1. Female molts: Females release pheromones after molting that signal readiness
2. Male pursuit: Males actively seek out receptive females
3. Mating: Brief coupling occurs, with the male transferring sperm
4. Egg laying: Within days, the female lays 20-30 eggs and attaches them under her tail
5. Incubation: The female fans the eggs with her swimmerets for 3-4 weeks
6. Hatching: Miniature shrimp emerge fully formed and independent

Raising Young

Baby Cherry Shrimp are incredibly small but self-sufficient from birth. In established tanks with plenty of moss and biofilm, they find sufficient food naturally. No special care is required beyond maintaining good water quality.

Survival rates improve with:

• Dense planting or moss
• No predatory fish
• Stable water parameters
• Abundant biofilm

Common Health Issues and Prevention

Cherry Shrimp are generally hardy but susceptible to specific problems.

Failed Molts

Causes: Insufficient calcium or minerals in water, sudden parameter changes, poor nutrition

Symptoms: Shrimp unable to escape old shell, white ring of death (white band around body), shrimp dying during molt

Prevention: Maintain appropriate GH (4-14 dGH), provide calcium-rich foods, ensure stable parameters

Bacterial Infections

Symptoms: White or cloudy patches on shell, lethargy, loss of color

Treatment: Improve water quality, remove affected shrimp, salt baths may help

Parasites

Planaria: Flatworms that prey on shrimp eggs and babies

• Treatment: Traps or chemical treatments safe for shrimp

Scutariella: Parasitic worms on shrimp heads

• Treatment: Salt dips or specific medications

Vorticella: Protozoans that appear as white fuzz

• Treatment: Salt baths or improved water quality

Copper Toxicity

Symptoms: Rapid death, erratic behavior before death

Prevention: Never use copper medications in shrimp tanks. Check fertilizers and treatments for copper content.

Tips for Success

• Start with a minimum of 10 shrimp to establish a viable breeding colony
• Cycle the tank completely before adding shrimp
• Use drip acclimation over 1-2 hours when introducing shrimp
• Maintain live plants, especially mosses, for biofilm and hiding places
• Test water regularly, especially for ammonia and nitrite
• Avoid medications containing copper
• Allow biofilm to establish before adding shrimp to new tanks
• Feed sparingly - overfeeding kills more shrimp than underfeeding
• Keep a separate shrimp-only tank for maximum breeding success
• Selectively breed higher grades if interested in color improvement

Frequently Asked Questions

How many Cherry Shrimp should I start with?

Start with at least 10 shrimp to ensure you have both sexes and can establish a breeding colony. More shrimp means faster colony growth and better social behavior.

How fast do Cherry Shrimp reproduce?

In optimal conditions, females produce a new batch of eggs every 6-8 weeks. Each batch contains 20-30 eggs. Colonies can grow rapidly, potentially doubling in size every few months.

Why are my Cherry Shrimp losing color?

Color loss usually indicates stress from poor water quality, inadequate diet, or incorrect parameters. Check ammonia, nitrite, and nitrate levels. Ensure they receive varied nutrition including plant matter.

Can Cherry Shrimp live with fish?

Yes, but only with small, peaceful fish that cannot fit shrimp in their mouths. Good options include small tetras, rasboras, and pygmy corydoras. Avoid all aggressive or predatory fish.

What do Cherry Shrimp eat?

Cherry Shrimp graze constantly on biofilm and algae. Supplement with algae wafers, blanched vegetables, and specialized shrimp foods. They are omnivores and will eat most prepared foods.

How long do Cherry Shrimp live?

With proper care, Cherry Shrimp live 1-2 years on average. Some individuals may live longer under optimal conditions.

Why is my Cherry Shrimp turning white?

A white ring around the body indicates an upcoming molt, which is normal. However, if the entire shrimp turns white or cloudy, this indicates a bacterial infection or failed molt.

Do Cherry Shrimp need a heater?

Not necessarily. They tolerate temperatures from 65-78°F. In rooms that stay within this range, no heater is needed. However, stable temperatures in the 70-76°F range promote better breeding.

How do I acclimate Cherry Shrimp?

Use drip acclimation over 1-2 hours. Float the bag to match temperature, then slowly add tank water drop by drop until the volume doubles. Never add store water to your tank.

What kills Cherry Shrimp?

The most common causes of death are ammonia/nitrite poisoning, copper exposure, failed molts from soft water, and predation by fish. Ensure proper cycling, test water regularly, and choose tank mates carefully.

Can I keep different colored Cherry Shrimp together?

Yes, but they will interbreed and produce wild-type brown offspring over generations. Keep different colors separate if you want to maintain pure strains.

Do Cherry Shrimp need special lighting?

No special lighting requirements, though moderate lighting promotes algae and biofilm growth that shrimp feed on. Avoid intense lighting that might stress them.

How do I know if my Cherry Shrimp are happy?

Happy shrimp display bright coloration, actively graze throughout the tank, and breed regularly. They should move freely and not hide constantly unless molting or newly introduced.

Can Cherry Shrimp climb out of tanks?

Yes, they are excellent climbers and can escape through small openings. Always use a secure lid on shrimp tanks.

Do Cherry Shrimp clean algae?

Yes, they are excellent algae eaters, consuming soft algae, hair algae, and biofilm. However, they won’t eat all types of algae, particularly tough green spot algae.

What’s the difference between Cherry Shrimp and Ghost Shrimp?

Cherry Shrimp are bright red, Neocaridina species that breed readily in freshwater. Ghost Shrimp are transparent, Palaemonetes species that are less colorful and harder to breed.

Can Cherry Shrimp live in a 5-gallon tank?

Yes, 5 gallons is sufficient for a small colony of 10-20 shrimp. Ensure the tank is fully cycled and heavily planted.

Do Cherry Shrimp need an air pump?

Not necessarily, but good water circulation and oxygenation benefit them. In heavily planted tanks with adequate filtration, an air pump isn’t required.

How do I increase Cherry Shrimp coloration?

Selective breeding from higher-grade specimens improves color. Good nutrition, stable parameters, and dark substrate also enhance their red coloration.

Can I keep Cherry Shrimp with snails?

Absolutely! Cherry Shrimp and snails make excellent tank mates. Nerite snails, mystery snails, and ramshorn snails all coexist peacefully with shrimp.

Conclusion

Cherry Shrimp have earned their place as the most popular freshwater aquarium shrimp through their combination of beauty, hardiness, and ease of care. Their bright red coloration adds visual interest to planted tanks, while their constant grazing helps control algae and clean surfaces.

Whether kept in a dedicated shrimp-only nano tank or as part of a peaceful community aquarium, these fascinating crustaceans provide endless entertainment through their active foraging and breeding behaviors. Their prolific nature means a small starter colony can grow into a thriving population, making them both rewarding and economical for aquarists of all experience levels.

Success with Cherry Shrimp comes down to providing stable water parameters, choosing appropriate tank mates, and maintaining the biofilm-rich environment they need to thrive. With proper care, these tiny red jewels will bring life and color to your aquarium for years to come.