Lyla Lindsey
The Australian red claw crayfish (Cherax quadricarinatus) is a species of freshwater crayfish native to the tropical region of northern Australia and the catchments of southeastern Papua New Guinea. They are known for their rapid growth and flexible eating habits, consuming a wide variety of foods, including plant matter and meat. With their ability to adapt well to captivity and simple breeding process, they are a popular choice for aquaculture and are recognized as a safe and healthy product. Given their opportunistic eating habits, a common concern among those interested in keeping them is whether they will eat their babies or not.
| Characteristics | Values |
|---|---|
| Do Australian red claw crayfish eat their babies? | There is no evidence to suggest that Australian red claw crayfish eat their babies. However, they are opportunistic eaters and will eat each other when moulting and vulnerable. |
| Species | Cherax quadricarinatus |
| Native to | Tropical Queensland and the Northern Territory in Australia, and the catchments of southeastern Papua New Guinea |
| Habitat | Freshwater |
| Breeding season | Between September and April |
| Number of eggs per brood | 300-800 |
| Diet | Omnivorous, but the majority of their diet is vegetable |
| Water temperature for optimal growth | 26°C-29°C |
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What You'll Learn
Australian red claw crayfish are omnivores
The optimal food for juvenile Australian red claw crayfish is zooplankton. In captivity, a good mix of meats and vegetation is necessary for their best growth. Natural pond production can provide a significant amount of their nutritional requirements, including plankton, bacteria, and protozoans. Additionally, formulated pellets are often supplemented with grains to provide a basic food base.
For those keeping Australian red claw crayfish in a community tank, it is important to note that they may kill and eat the fish in their tank. They are known to be particularly fond of catfish pellets and algae wafers. A well-rounded diet for these crayfish can include a variety of foods such as peas, courgette, cucumber, carrots, and bloodworms/fish as occasional treats.
In terms of breeding, successful reproduction depends on water temperature and hours of sunlight each day. The female broods the eggs for 6 to 10 weeks, and most females produce 300 to 800 eggs per brood. The hatchlings remain attached to the underside of the female for several weeks before gradually becoming independent. It is important to provide shelter during this vulnerable stage to increase their survival rate.
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They can be kept in aquariums
Australian red claw crayfish can be kept in aquariums, and they are the only species of crayfish that can be kept in indoor aquaria for ornamental use in the UK (excluding Scotland) without a licence. They are a species of freshwater crayfish native to tropical Queensland and the Northern Territory in Australia, and they are also farmed commercially in these regions.
If you are keeping Australian red claw crayfish in an aquarium, it is important to note that they are very good escape artists, so it is advisable to keep your tank covered as much as possible. They are nocturnal and are most active in the late evening and at night, gradually stopping their activity before sunrise. They will then usually look for a place to hide. As they do not burrow, you can provide mesh materials such as onion bags or short lengths of pipe for shelter.
In terms of diet, red claw crayfish are omnivores and extremely opportunistic eaters. They can eat almost anything edible they come across, including plants, and they have flexible eating habits that include a wide variety of foods, including prepared diets. However, it is important to provide them with a diverse diet and not give them the same food all the time. While adult crayfish can perform well on a relatively low-protein diet with a high proportion of cheap plant material, this is not recommended for hatchlings and juveniles as it can adversely affect their growth and increase aggression. Instead, juveniles should be fed a good mix of meats and vegetation, with protein comprising around 22% of their diet.
When it comes to breeding, successful reproduction depends on water temperature and hours of sunlight each day. In their natural environment, crayfish breed between September and April, but this period can be lengthened in a controlled setting by adjusting the temperature to simulate the breeding season. Females produce 300–800 eggs per brood, which are fertilised by the male and then incubated for approximately six weeks. The hatchlings remain attached to the female's underside for several weeks before becoming independent.
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They are native to Australia and Papua New Guinea
The Australian red claw crayfish (Cherax quadricarinatus) is a large freshwater crayfish native to the tropical region of northern Australia and the catchments of southeastern Papua New Guinea. It is a species of freshwater crayfish native to tropical Queensland and the Northern Territory. They are recognised as a safe and healthy product, and their natural habitat is a turbid billabong that is flushed during the wet season, although commercial grow-outs are done in earthen ponds.
In Queensland, the industry is well-developed, and red claws are relatively economical to produce due to their simple production systems and natural breeding. They have biological characteristics that give them an advantage in aquaculture, such as rapid growth (65-91 grams in four months) and potential sizes over 450 grams. This makes them attractive to be marketed as small freshwater lobsters. Additionally, they have a lack of complex larval stages, few major diseases, tolerance to high culture densities, and flexible eating habits.
Red claw crayfish are nocturnal and active in the late evening and at night, gradually stopping their activity before sunrise. They are non-burrowing and excellent escape artists, so it is recommended to keep their tanks covered as much as possible. They are also known for their opportunistic eating habits and will eat almost anything edible they come across. In captivity, they need a good mix of meats and vegetation, and their diet should include protein.
Regarding breeding, red claw crayfish naturally breed between September and April, and the female broods the eggs for 6 to 10 weeks, depending on the temperature. Most females produce 300 to 800 eggs per brood, and the hatchlings remain attached to the underside of the female for several weeks before becoming independent. Successful breeding depends on water temperature and hours of sunlight each day, and techniques for breeding and juvenile production vary between farms and regions.
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They are relatively easy to breed
Australian red claw crayfish are relatively easy to breed. They are a species of freshwater crayfish native to the tropical region of northern Australia and the catchments of southeastern Papua New Guinea. They are also found in Queensland and the Northern Territory, where they are farmed commercially.
Red claw crayfish have biological characteristics that make them well-suited for aquaculture. They can grow rapidly, reaching potential sizes of over 450 grams, and can be marketed as small freshwater lobsters. They have a lack of complex larval stages, few major diseases, and a high tolerance for culture densities. They are also very adaptable and flexible when it comes to their diet, which includes a wide variety of foods, including prepared diets.
In the wild, red claw crayfish naturally breed between September and April. Successful breeding depends on water temperature and hours of sunlight each day. In a controlled environment, the breeding period can be lengthened by adjusting the temperature to simulate the onset of the breeding season.
In terms of diet, red claw crayfish are omnivorous and opportunistic eaters. They can eat just about anything they come across, including plant material, meats, and vegetation. However, it is important to provide a diverse diet and not feed them the same thing all the time. For optimal growth, a mix of meats and vegetation is recommended, with protein comprising about 22% of their diet.
Red claw crayfish mature between 7 and 12 months, and the most obvious sign of maturity in males is the development of a red patch on the outer margin of the claws. Females are smaller than males and can produce 300-800 eggs per brood, which are fertilised by the male. The female broods the eggs for 6-10 weeks, depending on temperature, and the hatchlings remain attached to her underside for several weeks before becoming independent.
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They are vulnerable after moulting
Australian red claw crayfish (Cherax quadricarinatus) are a species of freshwater crayfish native to the tropical region of northern Australia and the catchments of southeastern Papua New Guinea. They are known for their rapid growth and ability to survive under harsh conditions, making them suitable for aquaculture.
Like all crustaceans, red claw crayfish moulting or shed their shells as they grow. Immediately after moulting, they have soft shells and are vulnerable to predation, including by their own kind. This is why it is important to provide shelter for farmed red claw crayfish, as it increases their chances of survival during this vulnerable stage. Suitable shelter can be provided in the form of mesh materials, such as onion bags or shade cloth, and short lengths of pipe.
The vulnerability of red claw crayfish after moulting is further exacerbated by their natural behaviour. As opportunistic eaters, they will eat anything they come across, including their babies. This behaviour is particularly notable when they are in a vulnerable state, as they may view their offspring as an easy meal.
Additionally, red claw crayfish are known to be skilled escape artists, which can make them challenging to keep in captivity. It is recommended to cover their tanks as much as possible to prevent escape attempts.
To summarise, Australian red claw crayfish are vulnerable after moulting due to their soft shells and natural behaviour of cannibalism. Providing adequate shelter and taking precautions to prevent escape can help mitigate these risks and improve their chances of survival in captivity.
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