What is a Marron?

Australian Marron are just one of many species of fresh-water crustaceans. The scientific name of Australia Marron is Cherax Cainii. 

Australian Marron are indigenous to the south west of Western Australia and are the largest commercially grown fresh water crustacean.

The shell colour of a live marron can vary from red or brown through to black or a highly vibrant blue colour. This is dependent on genetics but a common feature is that when cooked they all change to a very bright crimson red. 

How Big do they Get?

The size of Australian Marron have been known to reach in excess of 2.0kg, however most sold within the commercial industry weigh between 150-300g.  This will take approximately eighteen months to three years to reach when optimum conditions are maintained.

A great delicacy

The recovery rate of meat per animal is among the highest of all crustaceans.  The flavour of Australian Marron is quite subtle, slightly sweet with nutty overtones and a firm consistency.  Regardless of size, marron are one of very few animals that retain the same delicate taste and texture.

Australian Marron are fast becoming regarded by leading chefs around the world as a premier crustacean and are regularly being presented in international cooking contests.

A great addition to your aquarium!

For the aquarium buyer, electric blue marron add a colourful addition to your tank. They contrast well with the other occupants and because of their shape, character and activity provide a variety to your aquarium experience that you cannot achieve with fish alone.

Their daily activity can provide hours of entertainment and as they are not a burrowing type of crustacean will not upset your formation of the aquarium.

Download your True Blue Marron Care info sheet


Click on any of the questions below to find out more about Freshwater crusteaceans. If you find yourself asking more questions, contact us. You never know, your query may be added to this info! 

Can marron survive in my fishpond?

Yes they make a great addition to your fish tank.  However it is important to remember that they can climb and if there is a way to climb out they will find it!  Be aware that most town water contains high levels of chlorine and this can cause deaths with marron.  To prevent this, preferably rain water should be used to top up ponds, tanks etc however if this is unavailable you need to aerate your water for 48 hours prior to adding to pond or tank.

Do Blue marron taste different from the standard species?

No.  However due to the difference in pricing of this variety they are not normally purchased for consumption.  The choice is yours.

How long will marron survive out of water?

Marron can survive out of water for up to three weeks in ideal conditions.  These conditions would include low temperature and moisture in the air.  An important fact to remember is that once the gills of the marron have dried out, they cannot be returned to the water.

What do I feed my marron?

Technically marron are omnivores and as such enjoy a varied diet of both protein and plant matter.  We have found however that the best source of diet you can provide for your marron is by feeding them one of the commercially available marron pellets.  This ensures that their dietary requirements are being met as stringent quality control keeps the protein and mineral levels constant.  It also ensures that water quality won’t become polluted due to the feed.

What do I need in my aquarium to help my marron survive?

In general terms marron are a very hardy species.  This said there are several factors that will help them to survive.  Salinity levels must be kept low.  Marron can survive in saline water but should the levels reach 15 parts per thousand (ppt) deaths may occur.  Salinity levels from 6ppt and above will decrease the growth rate of your marron.  

Oxygen levels also need to be maintained.  These levels need to maintained above 6 parts per million (ppm) in order to keep marron happy.  Levels of 3ppm and below will stress the animals out and deaths may occur.

Temperature will also play a part in the survival of your marron.  Although marron can survive in very low temperatures, to achieve growth your marron will need the temperature above 12 degrees Celsius.  Optimum growth will occur at 24 degrees.  Above this temperature the growth rate will start to decline with mortality rates being high with marron kept at 30 degrees onwards.

What is the best way to introduce my newly acquired marron to their new home?

Prior to the arrival of your marron it is important to get the tank ready for them.  As mentioned above water quality, pH levels and temperature will play a part in achieving the best result with your marron.   Once this has been achieved and your marron have arrived you should slowly acclimatise them from the temperature within their packaging to the temperature within the tank.  For more information on this please refer to the 'marron fact sheet' (attached pdf)

Where can I find more information regarding marron?

By contacting ourselves or The Fisheries Department of Western Australia.

Email details as follows:



Will marron live well with other fish in my aquarium?

Provided that there is adequate room for all occupants and some landscaping within the tank there should be no problems at all.  Problems could arise if your tank is over populated as they are territorial to a certain degree and like to have their own space at times.