Blue Mexican Dwarf Crayfish 'Cambarellus texanus'

The Blue Mexican Dwarf Crayfish (Cambarellus texanus), also known as the Blue Brazos Dwarf Crayfish, is a small, vibrant freshwater crustacean popular for nano aquariums. Unlike the common orange variant (C. patzcuarensis), C. texanus is native to the Gulf Coast plains of Texas.

• Adult Size: Typically reaches 4–5 cm (1.5 to 2 inches).
• Lifespan: Average of 1.5 to 3 years.
• Temperament: Generally peaceful but territorial towards its own kind. They are more active and less prone to hiding than larger crayfish species.
• Tank Size: Minimum 19 Liters (5 gallons), though 38+ Liters (10+ gallons) is recommended for multiple individuals to reduce aggression.

• pH: 6.0 – 8.0. Some keepers suggest keeping pH below 7.0 helps maintain the blue hue, as higher pH can cause them to revert to brown.
• Hardness: Requires moderate to hard water (KH 6–12, GH 3–25) to support healthy molting.
• Diet: Opportunistic omnivores. Feed high-quality sinking pellets, blanched vegetables (zucchini, peas), and protein-rich frozen foods like bloodworms or brine shrimp.

• Hiding Spots: Essential for safety during the molting process when they are vulnerable. Use rocks, driftwood or caves.
• Plants: Unlike larger crayfish, they are generally plant-safe and do not uproot or eat live vegetation.
• Tank Mates: Best kept with fast-moving surface or mid-level swimmers like rasboras, danios, and guppies. Avoid bottom-dwellers like cichlids or larger crayfish that may prey on them. Use caution with dwarf shrimp, as they may occasionally hunt smaller or slower individuals.
• Escape Prevention: They are excellent climbers. Ensure the aquarium has a tight-fitting lid with no gaps.