Queensland Lobster Crayfish

Cherax quadricarinatus, commonly known as the Queensland Redclaw or Australian Freshwater Lobster, is one of the largest and most commercially significant freshwater crayfish in the world. Males develop a distinctive bright red patch on the outer margin of their claws, contrasting with a rich blue-green body that makes them among the most visually impressive freshwater invertebrates available in the hobby.

Native to the tropical rivers of northern Australia and southern New Guinea, this species requires warm water and ample space. It is a powerful burrower and will reorganise any aquarium layout given the chance. Despite its large size, it is considered moderately peaceful for a crayfish of its stature and can sometimes be kept with other large, robust fish.

Feeding is straightforward as C. quadricarinatus is a highly opportunistic omnivore. Commercial crayfish pellets supplemented with vegetables and occasional protein provide excellent growth rates. Juveniles grow rapidly and will need tank upgrades within a year.

Water: 22–30°C, pH 7.0–8.5, GH 8–20, KH 3–12; warm tropical water with good oxygenation. Tank: minimum 200 L, large caves, smooth substrate, very strong filtration; tight lid essential. Feeding: omnivore — crayfish pellets, vegetables, fruit, frozen prawns, occasional fish fillet. Breeding: female broods 100–1000 eggs under pleopods; juveniles independent and fast-growing. Compatibility: large and predatory — keep with large robust fish only; will eat shrimp and small fish.