Zebra Cherax Crayfish

Cherax peknyi, commonly known as the Zebra Crayfish or Mozam Crayfish, is a highly distinctive Papua New Guinea species defined by bold alternating dark and pale striping along the carapace, paired with vivid electric-blue highlights on the chelae and leg joints. Its striking appearance makes it one of the most expensive and desirable ornamental crayfish in the global hobby.

In nature, C. peknyi inhabits clear, warm freshwater streams in Papua New Guinea over rocky substrate with abundant organic debris. In aquaria it requires similar conditions — structured rockwork, caves, and excellent water quality to maintain its vivid coloration. It is less tolerant of poor water quality than hardier Cherax species.

Breeding C. peknyi in captivity is achievable with a well-matched pair. Males can be identified by their more robust chelae and brighter blue highlights. Females brood small clutches of large eggs, and juveniles show striping from a very early age.

Water: 20–27°C, pH 7.0–8.0, GH 6–15, KH 3–10; high water quality critical for colour retention. Tank: minimum 120 L, rocky caves, smooth substrate, excellent filtration; avoid plants. Feeding: omnivore — high-quality sinking pellets, blanched vegetables, leaf litter, occasional protein. Breeding: male-female pair; female broods 30–80 large eggs; juveniles striped from hatching. Compatibility: aggressive toward conspecifics; keep as singleton or M/F pair with visual barriers.