Electric Blue Crayfish
Procambarus alleni
The Electric Blue Crayfish (Procambarus alleni) is a semi-aggressive invertebrate that's easy to keep. Give it a tank of at least 75 litres (20 US gallons), water held at 64-82°F, and a pH of 6.5-8. Always keep a group of at least 3 - they feel safest in numbers.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
North America
- Central America & Mexico
Regional colours match the stocking calculator's origin map.
Electric Blue Crayfish Tank Setup
A tank of 75 litres (20 US gallons) or more with rock-steady water suits them best - keep it at 64-82°F with a pH around 6.5-8. Stable conditions matter most, as shrimp struggle to moult and breed when parameters bounce around. Always keep a group of at least 3 of their own kind - kept alone or in pairs they tend to turn shy, nippy, or wash out in colour. They reach about 13 cm as adults, so don't be misled by the small juveniles sold in stores.
What Do Electric Blue Crayfish Eat?
They're bottom feeders, so give them sinking wafers, tablets, or frozen treats like bloodworm once the lights go down. Flakes that never reach the bottom leave them hungry even when the tank looks well-fed.
Electric Blue Crayfish Tank Mates
Predatory; may eat small fish or inverts. The Electric Blue Crayfish is semi-aggressive, which is the first thing to weigh up when you choose tank mates. It's predatory, so anything small enough to fit in its mouth will be treated as food rather than a companion. It's a shoaling fish, so settle a group of 3 or more of its own kind before adding anything else - a stressed, lonely fish is far more likely to nip or hide. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Electric Blue Crayfish Good for Beginners?
Not a sensible first purchase. Get the tank cycled, keep easier fish stable for a year, then revisit if you still want the extra work this species demands.
Electric Blue Crayfish - frequently asked questions
What size tank do Electric Blue Crayfish need?
Electric Blue Crayfish need a tank of at least 75 litres (20 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
How many Electric Blue Crayfish should I keep together?
Keep a group of at least 3. Electric Blue Crayfish are a shoaling species and become stressed, lose their colour, or hide when kept singly or in pairs.
What water parameters do Electric Blue Crayfish need?
Keep them at 64-82°F with a pH of 6.5-8, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Electric Blue Crayfish eat?
Electric Blue Crayfish are bottom feeders. Give them sinking wafers, tablets, and frozen foods that settle on the substrate, ideally after the lights go off. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Electric Blue Crayfish good for beginners?
Yes - Electric Blue Crayfish are a good beginner choice once the tank is fully cycled and you can keep a proper group. They are hardy but still need stable water and a school to feel secure.
Common mistakes with Electric Blue Crayfish
- Adding to an uncycled tank - always wait for the nitrogen cycle to complete; small schooling fish are especially vulnerable to ammonia.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Check Electric Blue Crayfish against any other fish → Compares water parameters, predation risk, fin nipping and tank size, and draws both at life size.
Fish to avoid mixing with Electric Blue Crayfish
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- AxolotlPredator - Axolotl will eat or injure smaller tank mates
- Clown LoachFin nipper - will shred the fins of peaceful fish
