Australian red claw crayfish, Queensland red claw, Redclaw, Tropical blue crayfish, Freshwater blueclaw crayfish
Cherax quadricarinatus (known by several common names, including Australian red claw crayfish, Queensland red claw, redclaw, tropical blue crayfish, freshwater blueclaw crayfish) is an Australian freshwater crayfish.
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ScavengerScavengers are animals that consume dead organisms that have died from causes other than predation or have been killed by other predators. While sc...
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OviparousOviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
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starts withThe colour of C. quadricarinatus ranges from dark brown to blue-green. Their heads have four keels (as inferred by the epithet), and adult males have a distinct red patch on the outer margin of the claws. They can reach up to 600 grams (21 oz).
C. quadricarinatus is native to permanent freshwater streams, billabongs and lakes on the north coast of the Northern Territory, northeastern Queensland, and Papua New Guinea. Through translocation by humans, the range has spread down to southern Queensland and into the far north of Western Australia. C. quadricarinatus is considered an invasive species, and has established feral populations in South Africa, Mexico, Jamaica, Puerto Rico, Indonesia, Zambia, Malaysia and Singapore.
This tropical crustacean is very tolerant of environmental changes, and is primarily a detritivore.
Females, which are smaller than males, spawn 300–800 olive-green eggs per brood, which are fertilised from a spermatophore which the male has deposited at the base of her walking legs (pereiopods) during mating. Fertilised eggs are affixed to the female's pleopods, situated on the underside of the tail. Incubation takes approximately six weeks and the newly hatched juveniles rapidly become independent.
