Redclaw Crayfish (Cherax quadricarinatus)

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Redclaw Crayfish

Cherax quadricarinatus-7827.jpg
Redclaw Crayfish

Cherax quadricarinatus

Moderate

75.708 liters
75,708.236 mL
75.7 Litres (20 US G.)

20.32 cm 17.8-20.3cm (7-8 ")

sg

Freshwater

pH

7.2 - 7.8

285.928 K
12.778 °C
514.67 °R
308.15 K
35 °C
554.67 °R
12.8-35°C (55 -95 °F)

10-50 °d

1:1 M:F

Uncommon

3-12 years


This animal is available captive bred




Contents

Alternative names

Redclaw Crayfish, Blue Lobster, Australian Crayfish

Sexing

The adult male gets a distinctive red patch on the outside of his claws, this is absent on females. On the rare "blues" from Cherax Park, Au. the red stripe is replaced with a translucent white on the males.

Tank compatibility

They are a bottom dweller and will eat anything they come across, as they are opportunistic eaters. It is not advisable to keep this species in the same aquarium as aquatic frogs or snails as these are easy prey for this species. If they can catch passing fish, these will also be eaten. Ideally they're best kept in single species tanks only. Plants will be uprooted & eaten. Sunken wood will also be consumed.

Diet

These Crayfish are omnivorous, and will act as a scavenger in the aquarium, eating any food that comes to rest on the bottom. Supplement their diet with a quality sinkingsinking pellet, flake food and dried algae. Gum tree bark is easily sunk, & will disappear quickly. Frozen peas are also a favourite.

Feeding regime

Feed once or twice a day - supplementing when necessary.

Environment Specifics

Plenty of cover should be included in the aquarium, including both rocks and plants (Although the plants will not last long as the cray gets larger). After moulting the crayfish is vulnerable to attack and consumption by others.
If the exuvia (shed exoskeleton) is removed from the tank after shedding, the crayfish will likely die as this shed will be consumed for vital calcium. If your water has enough calcium in it this will not be an issue however.

Behaviour

They do not burrow as much as other species. They will dig out under rocks & enlarge holes where possible. The females are territorial when with eggs. A larger aquarium will be needed if housing more than one. Provide at least 80 Litres (21.1 US G.) per Cray and include plenty of cover including both rocks and plants. Fights are common, often resulting in loss of limbs, especially as the water gets warmer.

Identification

Generally they are blue to a blue/brown/green colour. Because of their selective breeding in the hobby, they will not change to their original colouration, except in times of stress or when feed or housed incorrectly. The blue colour seems to intensify when the water is clean, and be more green/brown when left in brackish water.

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