Vivid cobalt-blue freshwater crayfish; entertaining to watch, but keep it away from small fish and shrimp.

• Scientific name: Procambarus alleni
• Adult size: about 10 cm
• Temperature: 22–28 °C
• Water: pH 7.0–8.0
• Minimum tank size: 80 litres
• Temperament: semi-aggressive; choose tank mates carefully
• Diet: omnivore
• Care level: moderate

Supplied in oxygenated bags. Please acclimatise slowly using the drip or floating-bag method for 30–45 minutes before release.