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Sleepy Cod (Oxyeleotris lineolata) General information

Australian sleepy cod (Oxyeleotris lineolata)

Below left: Young male Australian sleepy cod, ready to breed. Right: A very rare gold form of Australian sleepy cod.

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This page containes general information about sleepy cod. For more information go to the members area.

One of the most promising fish for future aquaculture. This fish has many qualities to give it all-round appeal as aquaculture species for the future.
It has been argued that this species has the best eating quality of all Australian freshwater fish.
Extremely easy to transport at high densities.
High flesh recovery.
Can be kept and grown in high densities.
Never have muddy flavour.

The Fitzroy/Dawson River strain, grow better than northern strain for aquaculture.
Recirculating systems necessary for grow-out.
Must be stocked at high densities.
High fat diets, (15-20%) undesirable as the fat damages the liver, this will affect FCR because the liver is an important part of the digestive system.
Placid and easy to handle.
Fitzroy/Dawson strain genetically distinct from northern strain.
Sleepy cod grow faster in tanks than in ponds
Males grow slower.
Best above 26C. Below 22C not recommended, with problems below 18C

The colour of sleepy cod can change according to environmental conditions. it is possible to manipulate their colour  to provide fish to the market in a preferred colour. Temperature and light are the factors that effect the fishes colour. They are capable of changing colour within a few minutes. Sometime very rare colour forms of sleepy cod occure. These fish are only found in one or two streams in Queensland. We are breeding from these fish to develope more atractive colour forms.

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The sleepy cod is not suitable for free-range pond culture as they are highly carnivorous and cannibalistic, as well as very territorial. They are able to eat other sleepy cod fingerlings up to half their size. It is necessary to grade fingerlings regularly. It is also possible for the fish to stop feeding on the artificial diet if they are in an open environment. Best culture methods include, tanks (RAS), cages, raceways, and partitioned aquaculture systems (PAS).