Size and bag limits exist so that fish get a chance to breed before they are taken. They are also the rules most commonly broken by accident, usually because the angler measured the fish the wrong way.
This guide explains how measurement and possession work in general terms across Australia. Exact numbers differ by state and change regularly, so always check the current limits for the water you are fishing.
How to measure a fish correctly
Most Australian species are measured as total length — from the tip of the snout to the tip of the tail, with the tail lobes squeezed together. A few, like some tropical species, use fork length instead.
Measure on a flat brag mat with the fish laid straight, not on a wet gunwale by eye. A fish that is 'about legal' is a fish you should release.
Bag limits versus possession limits
A bag limit is what you may take in one day. A possession limit is the total you may have anywhere — in the boat, the esky, the caravan fridge or at home — and it is usually the same as or double the daily bag.
Filling the freezer over a week-long trip is where people fall foul of the rules. Fisheries officers check freezers, and fillets can be counted back to whole-fish equivalents.
Rules people forget
Fillet-at-sea restrictions apply in many states — you often must keep a frame or a specified skin patch so the species and size can be verified on shore.
Combined limits apply to species groups such as reef fish or mixed bag categories, so five of one and five of another may still exceed the rule. Protected species like Australian bass in closed season and all grey nurse sharks are no-take regardless.
Releasing fish so they survive
Use wet hands or a knotless net, support the fish horizontally and keep it out of the water for under ten seconds. A fish that swims off strongly still may die hours later from mishandling.
For fish brought up from depth, a release weight or venting tool dramatically improves survival. Barotrauma kills more released reef fish than hooks do.
Key takeaways
- ▸Measure total length on a flat mat, not by eye.
- ▸Possession limits cover fish at home, not just in the boat.
- ▸Check combined-species limits and fillet-at-sea rules.
- ▸Handle releases wet, fast and horizontal.
This guide is general information only. Fishing regulations differ by state and change regularly — confirm current rules with your fisheries authority before you fish.