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Yabbie Blue Crayfish


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Product Description

Temperature Range: 62 – 85 F.
Habitat: Freshwater 
Diet: Omnivore
Species: Cherax Quadricarinatus
Life Span: 3-4 years

Blue crayfish originate from Queensland and the Northern Territory of Australia and south-eastern Papua, New Guinea. They are typically found in freshwater streams and lakes. Blue crayfish are also called tropical blue crayfish, blue yabbie, and Queensland red claw. Their colors vary, but most are a dark brown or a blue-green color. The male blue crayfish has a red patch on his claw. The females have more coloring on their thorax and abdomen than the males have. Blue crayfish do best in a large, well-filtered and aerated tank, and they can withstand considerable variance in water temperature. They are hardy crayfish, and they are easy to maintain. A silty sand substrate works well for blue crayfish, although they are not burrowers. Rocks and pieces of wood will provide places for them to sit, but they will mostly stay in the water along the bottom of the tank. Be sure to give them plenty of space if you have more than one blue crayfish in a tank. They will nip at or eat fish, so they don’t make good tank mates for slow moving fish. Blue crayfish are omnivores, and they are great scavengers. They will eat plant detritus from the tank, in addition to most other foods. You can supplement their scavenging with fresh vegetables and any kind of fish or shrimp food, such as flakes, pellets, and dried algae. You can also feed them meats, such as brine shrimp, blood worms, or earth worm segments. You should offer them a variety of foods daily, and you should also give them extra calcium, such as eggshells or cuttlebone. They need calcium for formation of their exoskeleton, and they will eat their discarded exoskeleton when they molt. Blue crayfish reproduce in fresh water, and it is usually not a problem getting them to reproduce in captivity. Young female blue crayfish will carry 300-400 eggs, and more mature females will carry up to 800. The eggs are olive colored, and the female carries them under her tail. It takes about six weeks for the eggs to hatch, and the offspring grow quickly. They will molt 4 or 5 times in their first year of life. Mature blue crayfish will molt only once or twice per year. For a couple of days prior to molting, the blue crayfish will not eat. It will hide when it molts, and it will reappear once its new exoskeleton has hardened. Blue crayfish are fairly active, even in the daytime. They spend the majority of their time scavenging along the bottom of the tank, and they will hide in the rocks and wood of the tank. Although they are not aggressive, they do view most things smaller than them as food, so be wary of what you put in a tank with them. Make sure the tank is well filtered and well aerated. As long as these two conditions are met, keeping the blue crayfish in an aquarium should go well. Color can vary from light blue to dark blue with some being mottled in color.

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