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Red Swamp Crayfish
Procambarus clarkii
Animalia›Arthropoda›Malacostraca›Decapoda›Cambaridae
📍 Southeastern United States
The Red Swamp Crayfish is a hardy, opportunistic freshwater crayfish prized for its vibrant red coloration and robust nature. Known for aggressive predatory behavior, this species will consume plants, small fish, shrimp, and snails, making tankmate selection critical. Popular among aquarists for its hardiness and interesting burrowing behavior, though it requires secure housing and careful planning.
Care Guide
Diet
Feed sinking pellets, blanched vegetables (zucchini, spinach), and protein sources (bloodworms, small shrimp) 3-4 times weekly. Provide calcium-rich foods and cuttlebone fragments to support molting. Reduce feeding during molting periods. Omnivorous and opportunistic; will scavenge dead matter and consume live prey.
Behavior
Nocturnal and highly territorial; spends daylight hours hiding in burrows or under structures. Aggressive predator that will hunt and consume small fish, shrimp, snails, and plant matter. Molts every 4-8 weeks; becomes vulnerable and reclusive during this period. Escape artist requiring a secure, tight-fitting lid. Destructive to aquatic plants and décor.
Breeding
Breeding is possible in captivity but challenging without dedicated breeding setup. Females produce 20-200 eggs and exhibit maternal care, fanning and protecting clutches. Requires separate breeding tank with hiding places and stable conditions. Juveniles are cannibalistic; separate or provide abundant shelter to improve survival rates.
Tank Mates
Large, armored pleco may coexist but crayfish may harass or injure during molting
Nocturnal pleco; territorial conflicts likely; size provides some protection
Hardy plant; tough leaves resist crayfish damage better than soft plants
Will be uprooted and consumed; provide in excess or secure firmly
Large cichlid; may fight crayfish but both are aggressive; requires large tank
Large predatory fish; may prey on juvenile crayfish or vice versa; aggression likely
Common Diseases
Shell Rot (Bacterial Infection)
Soft spots, discoloration, or erosion on exoskeleton; foul odor; lethargy; reluctance to molt
Improve water quality (frequent water changes, reduce ammonia/nitrite), provide calcium supplementation, isolate affected individual, maintain pH 7.0-8.0, consider antibacterial medication if severe
Molting Dysfunction
Inability to shed exoskeleton; stuck between old and new shell; death shortly after attempted molt; lethargy before molt
Ensure adequate calcium and iodine in diet; maintain stable water parameters; provide hiding places; reduce stress; increase water hardness (6+ dGH); do not disturb during molting process
Parasitic Infection (Branchiobdella, Vorticella)
Visible worm-like parasites on gills or body; excessive grooming behavior; lethargy; difficulty breathing; white film on body
Quarantine affected crayfish; perform frequent water changes; treat with salt baths (1-2 tablespoons per gallon for 15-20 minutes) or copper-free antiparasitic medication; improve water quality
Copper Toxicity
Lethargy; loss of appetite; discoloration; difficulty molting; death
Perform immediate large water change (50%+); remove any copper-containing medications or decorations; use copper-free treatments only; maintain water quality; avoid copper-based algaecides and medications
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Quick Facts
- diet
- Omnivore; feeds on sinking pellets, blanched vegetables, protein sources (bloodworms, shrimp), and calcium-rich foods for molting support
- lifespan
- 3-8 years
- max size
- 14 cm (5.5 in)
- tank size
- 20 gallons minimum
- temperament
- aggressive
Water it likes
- ph
- 6.5-8.0
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 6-20 dGH
- temperature
- 61–81°F (16–27°C)