In Western Australia, a razorfish isn't a fish at all — it's the razor shell or pen shell (Pinna bicolor), a large fan-shaped bivalve that stands buried point-down in seagrass and sand flats. The prize is the sweet, scallop-like adductor muscle inside.

Can you eat razor fish?

Yes. The white adductor muscle eats much like a small scallop — sweet and tender, best lightly seared in butter. Use it fresh on the day you gather it; most people discard the rest of the animal and keep only the muscle.

Where do you find razorfish in WA?

On sheltered, shallow sand and seagrass flats: Cockburn Sound (around Mangles Bay and Woodman Point), the Peel-Harvey estuary near Mandurah, parts of the Swan, and the Shark Bay seagrass meadows. Wade the flats at low tide and look for the fan-shaped shells standing up out of the bottom.

Is there a bag limit for razorfish in WA?

Yes. Razorshells (Family Pinnidae) are managed as a gathered mollusc with a daily and possession limit of 20 and no minimum size, per the DPIRD Recreational Fishing Guide. Sanctuary zones are no-take. Always confirm the current rules with DPIRD.

Do razorfish shells cut you?

They can — the thin shell edges are genuinely sharp, which is where the name comes from. Buried and discarded shells cut bare feet easily, so wear booties or sturdy reef shoes and a glove on your gathering hand.

Razorfish in WA: Finding & Gathering Razor Shells

First, the disappointment: in Western Australia a “razorfish” is not a fish. You will not catch one on a line, no matter how long you stand there. It’s a clam — the razor shell or pen shell (Pinna bicolor), a large fan-shaped bivalve that lives standing upright in the sand. The name comes from the shell, not the fight, and the shell will happily prove the point on the sole of your foot.

What it lacks in finfish drama it makes up for on the plate. Inside each shell is a single white adductor muscle that eats like a small scallop — sweet, tender, and worth the wade. This is a gathering trip, not a fishing one. You walk the flats at low tide and collect them by hand.

What a razorfish actually is

Razorshells are pen shells: large, triangular bivalves that bury themselves point-first in seagrass meadows and sandy flats, with the broad fan of the shell protruding from the bottom. They commonly run 20–40cm long. They sit anchored in place and filter-feed, which is why you don’t catch them — you find them and lift them.

In WA they’ve long been a feed and a bait source on the sheltered flats. Surplus muscle makes excellent bait for yellowfin whiting and bream, so a good gather rarely goes to waste.

Where and when to find them

Razorfish want sheltered, shallow water over sand or seagrass — calm flats, not surf beaches. The classic metro grounds:

Cockburn Sound — the protected flats around Mangles Bay at Rockingham and out from Woodman Point are long-standing razorfish country.
The Peel-Harvey estuary — the seagrass flats off the Coodanup foreshore on Peel Inlet and the broader Mandurah estuary hold them in good numbers.
Safety Bay and Shoalwater — the sheltered Safety Bay flats are wadeable and seagrass-rich (mind the marine-park zoning here — see the rules below).
Shark Bay — the vast seagrass meadows up north are the textbook razorfish habitat if you’re travelling.

Timing is simple: go on a daytime low tide in clear, calm conditions. A low tide shallows up the flats and lifts the shells into reach; calm, clear water lets you spot the fans standing proud of the bottom. Wind-chop and murky water make the whole job harder. Check the BiteCompass forecast for the low and the wind before you commit to a flat.

How to gather them — and not slice yourself

The method is low-tech and the hazard is the shell itself.

Wade slowly across the shallow flat and scan for the fan-shaped shells standing up out of the sand and seagrass. Calm, clear water on a rising sun makes them obvious.
Cut or lift. Either reach down and cut the adductor muscle in place with a knife, taking only the meat, or gently work the whole shell free and shuck it on shore. Cutting in situ leaves less mess on the flat.
Bag the muscle and keep it cool. Use it the same day.

Wear booties or sturdy reef shoes — the buried and broken shells are sharp and a bare-foot cut on a remote flat is a bad way to end a session. A glove on your working hand and a short knife or shucking tool are all the kit you need, plus a bag or bucket. Watch your footing the whole time; the shells you can’t see are the ones that get you.

A note on etiquette: don’t leave broken shells scattered across popular flats, and take only what you’ll eat.

The rules — check DPIRD

Razorshells are managed as a gathered mollusc under WA’s invertebrate rules, not as a finfish. Per the DPIRD Recreational Fishing Guide, the limits for razorshells (Family Pinnidae) are:

Daily and possession limit: 20
No minimum size

A separate licence is not generally required for hand-gathering molluscs from the shore, but the rules differ for collection from a boat and by area. Critically, sanctuary zones are no-take — Shoalwater Islands Marine Park near Safety Bay and Rockingham has sanctuary areas, so check the zoning before you gather there. Limits and zones change, so confirm the current rules with DPIRD before you head out.

The cook

This is the whole reason you waded out. Trim the white adductor muscle clean and treat it like a scallop. The simplest and best version: a hot pan, a knob of butter, 30–60 seconds a side until just golden, a squeeze of lemon, salt. Don’t overcook it — it goes rubbery fast, same as a scallop. It also folds neatly into a seafood pasta. Use it fresh on the day you gathered it; it doesn’t keep well.

The muscle isn’t the only thing on the flats worth a trip, either. If razorfish are quiet, the same sheltered grounds often hold southern calamari over the seagrass and blue swimmer crabs in the warmer months — a decent flat rarely sends you home empty.

In short

Walk a calm, shallow flat on a daytime low tide, watch your feet, keep it to 20, and cook the muscle like a scallop the same day. For the full species rundown, see the razorfish page.