Crayfish vs Lobster: What’s the Difference in WA?
Ask for “crayfish” in a Perth tackle shop and you’ll be pointed toward gear for the western rock lobster. Ask for it at a Sydney seafood market and you’ll get something else again. The word does a lot of work in this country, and in WA it does more than most.
The short version: the “cray” Perth talks about is a lobster, the real WA crayfish lives in freshwater, and the clawed lobster you’re picturing isn’t here at all.
Three groups, one confusing word
There are really three different animals tangled up in “crayfish vs lobster” in WA.
Rock lobsters (saltwater, no big claws). These are the spiny lobsters — the western rock lobster (Panulirus cygnus) that drives the famous west-coast fishery, plus the tropical painted crayfish (Panulirus versicolor) and its relatives up north. Long spined antennae, a heavily armoured shell, and — crucially — no large pincer claws. This is the “cray” or “crayfish” almost every WA angler means.
True clawed lobsters (saltwater, big claws). The animal most people picture when they hear “lobster” — the Boston or American lobster, with two heavy front claws. These belong to a different family in the cold North Atlantic and are not found in WA waters. That’s the single biggest source of confusion: the lobster in the picture and the lobster on the WA reef look nothing alike.
Freshwater crayfish (freshwater, clawed). WA’s genuine crayfish — marron (Cherax cainii), plus the smaller gilgie and koonac. These live in south-west rivers, dams and weirs, have proper claws, and are the closest thing WA has to a textbook “crayfish”.
So why is the WA “cray” called crayfish?
Habit, mostly. Western rock lobster has been “crayfish” or “cray” in WA vernacular for generations, long before anyone worried about scientific tidiness. It’s a rock lobster by biology and a crayfish by conversation. Fisheries paperwork and menus say “rock lobster”; the bloke pulling pots off Rottnest says “cray”.
How to tell them apart on sight
It’s easier than the naming suggests.
- Big front claws? It’s either a true clawed lobster (not WA) or a freshwater crayfish — and fresh water means marron, gilgie or koonac.
- No big claws, long spiny antennae, salt water? That’s a rock lobster — western rock lobster down south, painted or ornate up north. The western rock lobster is reddish-brown on cool west-coast reef; the painted crayfish is banded blue-green and white on tropical reef.
Where each is caught in WA
Western rock lobster is a metro-and-mid-west reef catch — pot or free-dive only, no rod and line. The inshore reefs off Rottnest Island and the metro grounds out from Mindarie Marina fish well early in the season, with the mid-west grounds off Lancelin, Cervantes and Jurien Bay producing through summer.
Marron is a south-west freshwater catch, taken by drop net or snare — never on a rod. The reliable public-access waters are Wellington Dam, Waroona Dam and the rivers and dams around Pemberton. Gilgie and koonac share those waterways but rarely get targeted — more kids’ dip-net catch than dinner.
Painted crayfish and the other tropical rock lobsters are a far-north job, hand-collected or potted on shallow coral reef in the Pilbara and Kimberley.
The rules — and they matter
This is where the terminology stops being academic — the two main “crayfish” of WA need two different licences.
Western rock lobster requires a Recreational Rock Lobster Licence — separate from any boat licence — and can only be taken by pot or by free-diving (no scuba, nets or spears). The minimum size is a 76mm carapace for the southern fishery, the daily bag limit is 8, and every lobster must be measured in the water and tagged before it leaves. Berried (egg-carrying) females go straight back.
Marron requires a separate Recreational Marron Licence and a short open season — typically a few weeks in midsummer, around January. They’re taken only by approved drop nets or snares, with a carapace size limit and tighter rules in designated trophy waters. Buy a marron gauge before you go; eyeballing the size is how people end up with a fine.
Both fisheries are actively patrolled, and the exact dates, sizes and bag limits shift between seasons — confirm the current numbers with the DPIRD recreational fishing rules before you set a pot or a net.
Frequently asked questions
Is a crayfish the same as a lobster?
Not exactly. Globally “crayfish” means a small clawed freshwater crustacean and “lobster” a larger marine one — but in WA the “cray” most people mean is the western rock lobster, and the true freshwater crayfish here is the marron.
Is a WA crayfish actually a lobster?
Usually, yes — when a Perth angler says “cray” they almost always mean the western rock lobster (Panulirus cygnus), a spiny rock lobster. The genuine freshwater crayfish are marron, gilgie and koonac.
What is the difference between marron and a crayfish?
Marron is a crayfish — WA’s large freshwater crayfish (Cherax cainii), with true claws. “Crayfish” in WA is also slang for the clawless saltwater rock lobster, which is the source of the mix-up.
Do rock lobsters have claws?
No large pincer claws. They’re spiny lobsters — long spined antennae and an armoured shell, but no big front claws. The clawed lobster people picture, like a Boston lobster, isn’t found in WA.
Do you need a licence for crayfish in WA?
Yes. Western rock lobster needs a Recreational Rock Lobster Licence (pot or free-dive only); marron needs a separate Recreational Marron Licence and a short summer season. Confirm current rules with DPIRD.
Big claws means a marron or a true lobster; a spiny, clawless reef animal is a rock lobster — and in WA, the one everybody calls “crayfish” is the rock lobster. See the western rock lobster and marron species guides for the full rules and methods, and check your conditions on BiteCompass before you head out.