Crayfish
Crayfish
Crayfish
Euastacus spp
The remaining information on this page refers specifically to the Murray cray
E. armatus , although most of the information is
applicable to all species in the group.
Size
A large species - Murray cray is the second largest freshwater crayfish in the
world. To greater than 150 mm carapace length.
Gippsland Cray E.
(The largest freshwater crayfish is the giant Tasmanian freshwater crayfish kershawi
Astacopsis gouldi which grows to at
least 400 mm overall and 3.6 kg and has been recorded at over 6 kg.)
Conservation Status
Insufficiently known
Habitat
Diet
Angling
Freshwater crayfish are usually caught using hoop nets, which lie flat on the river
bottom, with a suitable bait secured to the net. Can be abundant at times and are
subject to size and bag limits, which should be closely observed.
Females "in berry" or carrying young are totally protected and should be quickly
returned to the water.
Glenelg Cray E.
bispinosis
This photograph shows a female cray "in
berry", all such females must be returned to
the water unharmed.
On the table
Eating spiny crays with your bare hands will soon inform you of why they are so
named. <grin> The shell is covered with many needle sharp spines which leave
their mark upon you.
The meat is sweet and does not need any elaborate sauce to assist the flavour.
Crayfish are usually boiled in salted water for ten to twenty minutes, depending
upon size. This is a popular past-time at various riverside beaches along the
Murray during the cray season.
In the aquarium
E. woiwuru
Murray cray make spectacular aquarium specimens. Not usually available through
the aquarium trade, capture from the wild is the only real option. Since minimum
sizes apply, you will need a relatively large aquarium to successfully keep crayfish.
Spiny crays are notorious escapologists and most would put Houdini to shame.
Therefore you must ensure that you have a close fitting lid, preferably with a
heavy object on top of it, to keep the very strong animal in the tank. One Native
Fish Australia member returned home late one night to find his very large Murray
cray several hundred metres down the road happily heading off for who knows
where.
Relatively easy to keep, crays can be fed on small pieces of meat, earthworms,
small pieces of carrot peel and the occasional piece of green vegetable matter,
such a lettuce leaf, that has had its cell structure broken by freezing. A clean piece
of heavy old wood, perhaps a bit of mallee root, will also be appreciated, and A Murray cray returning home after a
chewed on. photo shoot.
Crays will destroy anything in the tank made of plastic and will demolish air stones
in quick order. A simple solution to this problem is to silicone a glass panel
diagonally across one corner of the tank, leaving a 1-2 cm gap at the bottom and
sufficient clearance at the top to allow for water flow, and to put any air stones etc
behind it where the cray can't get at them. Whilst on the subject of crayfish's
destructive habits, you should always handle them with extreme care as even quite
modestly sized individuals are quite capable of removing the top of a finger with
their pincers. <Ouch!>
On the web
Check our NFA member Dave Royal's great crayfish site - Crayfish World
For more details on the giant Tasmanian freshwater crayfish, see the Tasmanian Department of Environment
and Land Management page Giant Tasmanian Freshwater Lobster
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