Sulawesi Cardinal Shrimp

Caridina dennerli

Animalia›Arthropoda›Malacostraca›Atyidae

📍 Sulawesi

The Sulawesi Cardinal Shrimp is arguably the most stunning freshwater shrimp — a brilliant red body adorned with white spots, from the ancient alkaline lakes of Sulawesi, Indonesia. It is also the most demanding, requiring very warm water, elevated pH, and unique mineral composition mimicking its ancient lake habitat — parameters almost opposite to other Caridina species. It is intolerant of standard aquasoil buffering and must be housed in species-specific setups using Sulawesi mineral salts.

Size1"

Min Tank10g

School6+

peaceful

Zoneall

Care Guide

Diet

Sulawesi Cardinals are omnivorous grazers that primarily consume biofilm, algae, and periphyton in their natural habitat. Supplement with high-quality fine powdered shrimp food, spirulina-based pellets, and occasional blanched vegetables (spinach, zucchini) 2-3 times weekly. Feed small amounts daily, removing uneaten food within 2 hours to maintain water quality.

Behavior

These shrimp are peaceful, slow-moving grazers that spend most of their time foraging on substrate and hardscape surfaces. They are generally non-aggressive but may be stressed by aggressive tank mates or sudden environmental changes. They exhibit natural schooling behavior and are most confident in groups of 6 or more, displaying vibrant coloration when settled.

Breeding

Breeding Sulawesi Cardinals in captivity is extremely difficult and rarely successful in home aquariums. Females produce very small clutch sizes, and larvae require specialized conditions and foods that are challenging to replicate. Success requires pristine water parameters, stable temperatures, and expert-level husbandry; most specimens in the hobby are wild-caught.

Tank Mates

Amano Shrimp

Similar peaceful temperament and algae-grazing behavior; compatible water parameters with careful acclimation

good

Ghost Shrimp

Peaceful but may compete for food; requires separate feeding areas to prevent stress

caution

Nerite Snail

Excellent algae control partner with identical peaceful nature and minimal bioload

excellent

Horned Nerite Snail

Compatible grazer with no predatory behavior; adds diversity to cleanup crew

excellent

Japanese Ricefish

Small, peaceful fish that tolerate warm water; avoid overstocking to prevent competition

good

Common Diseases

Bacterial Infection

Symptoms

Discoloration, lethargy, loss of appetite, visible lesions or fuzzy growth on body

Treatment

Perform 25% water change immediately, maintain pristine water parameters (0 ammonia/nitrite), increase aeration, and consider antibacterial medication if condition worsens; isolation in hospital tank recommended

Molting Stress/Failed Molt

Symptoms

Inability to shed exoskeleton, lethargy, loss of appetite, death shortly after molt attempt

Treatment

Ensure adequate calcium and minerals via Sulawesi mineral salts; maintain stable pH 7.5–8.5 and temperature 27–30°C; provide soft plants and hiding spaces; avoid sudden parameter changes

Parasitic Infection

Symptoms

Visible parasites on body, erratic swimming, loss of color, excessive grooming behavior

Treatment

Quarantine affected individuals; perform gradual water changes to avoid osmotic shock; use species-safe parasite treatments; maintain optimal water quality and temperature

Nutritional Deficiency

Symptoms

Faded coloration, slow growth, lethargy, weak molting

Treatment

Diversify diet with quality powdered foods, spirulina, and blanched vegetables; ensure biofilm presence via established tank; supplement with calcium-rich foods and maintain stable mineral content via Sulawesi salts