freshwater-recreational-fishing-guide-2018-19
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27<br />
Fish identification and measurement<br />
Fish identification and measurement<br />
Most families of fish have a number of different species which can make identification difficult.<br />
It is important to know exactly what fish you catch as different regulations may apply to different<br />
species. Various reference books are available which clearly outline a fish’s defining characteristics.<br />
Some NSW species look quite similar. The following tips have been prepared to help identify<br />
popular species from similar looking fish.<br />
Australian Bass<br />
Snout length<br />
shorter than<br />
Estuary Perch.<br />
Pelvic fin<br />
white at<br />
leading margin.<br />
Snout profile – slightly<br />
concave to straight.<br />
Dark olive/grey/green on<br />
back fading to off-white<br />
or yellowish white below.<br />
Estuary Perch<br />
Snout profile<br />
– concave.<br />
Snout tapered and elongated<br />
(longer than Bass).<br />
Dark grey and silvery on<br />
back, paler below.<br />
All fins dark.<br />
Spiny Crayfish and Yabbies<br />
■■<br />
All Euastacus crayfish species have a set of spines along the bottom of the claws, making<br />
recognition relatively easy.<br />
■■<br />
Species of Euastacus crayfish can often be confused with the common yabby.<br />
■■<br />
Euastacus crayfish can also generally be distinguished from a yabby by its larger size and<br />
the presence of short robust spikes on its claws, carapace and abdomen. Yabbies are<br />
smooth shelled.<br />
Cherax Crayfish ‘Yabbies’<br />
Euastacus Crayfish ‘Spinies’<br />
NSW Recreational Freshwater Fishing Guide<br />
Smooth, no spines<br />
Rough, with spines<br />
Golden Perch and Silver Perch<br />
Small Golden Perch are often confused with small Silver Perch. Distinguishing features of Golden<br />
Perch are their olive green colouration, their yellow belly, their distinctly concave forehead above<br />
the eyes and their lower protruding jaw. In contrast, Silver Perch have a more silvery darker<br />
complexion on the back, are paler on the sides, have a white belly, have a smaller beak-like head,<br />
have a small mouth and small scales and their jaws are of equal length.<br />
Golden Perch<br />
Concave head.<br />
Protruding lower jaw.<br />
Olive green colouration.<br />
Silver Perch<br />
Small head, eyes.<br />
Jaws equal length.<br />
Darker silvery<br />
complexion on back.<br />
White belly.