Freshwater crayfish as prey
Explainer · Last reviewed 2026-08-11
Freshwater decapods found on every inhabited continent except Africa, and a disproportionately important food for the large predatory fish that share their habitat.
A supporting record, not a fishing profile
This page is here so FishingHQ can describe a biological relationship accurately — usually because a fish covered elsewhere on the site feeds on this. It covers what it is, where it lives and the evidence behind that relationship, and deliberately nothing about methods, bait or tackle. Its presence here is not a statement that anybody fishes for it.
Freshwater crayfish are decapod crustaceans occupying much the same ecological position in rivers and lakes that crabs occupy inshore: abundant, high in energy, and living in exactly the rock and timber that predatory fish also use.
They are treated separately from marine decapods here because the predators, the habitat and the conservation picture are all different. Smallmouth bass and spotted bass in North America, Murray cod and golden perch in Australia, and a range of European predators all take them heavily, and in several of those fisheries crayfish are the single most important item by weight in adult diets.
The conservation dimension is unusually sharp. Introduced crayfish have displaced native species across much of Europe and elsewhere, frequently carrying disease with them, and moving live crayfish between waters is prohibited in many jurisdictions. Any use of crayfish as bait is subject to local rules that vary considerably and are worth checking before rather than after.
The scope is the freshwater crayfish families — Astacidae, Cambaridae and Parastacidae — including the animals called yabbies, marron, koura and signal crayfish.
Where to go next
Fish this applies to
ChubCrayfish are taken readily where they occur, and the spread of introduced crayfish across European rivers has measurably changed what large chub eat.
Golden perchYabbies and other freshwater crayfish are a principal item in the golden perch diet across the Murray-Darling system.
Murray codMurray cod take yabbies and freshwater crayfish heavily alongside fish, and the species' association with snags is partly an association with crayfish habitat.
Smallmouth bassCrayfish are the single most important food of adult smallmouth bass by weight in most of their range, and smallmouth habitat choice is largely crayfish habitat choice.
Spotted bassSpotted bass take crayfish heavily from rocky ground, which is one of the habitat distinctions between them and largemouth bass in shared water.- White-clawed crayfishThe prey concept that existed before either crayfish species did, and which now has both ends of the story attached to it.
What these connections rest on (6)
Scientific evidence — 5 connections
Supported by peer-reviewed research or fisheries science. The sources are listed and can be checked.
Chub
Recorded diet evidence identifies freshwater crayfish as a food item of this predator at group level rather than to species. The edge points at the taxon record for that reason, and encoding it as a species-level claim would assert something the source does not.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Food items recorded for this predator, given as freshwater crayfish.States this directlyPassage read and verified
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Species account describing this predator's diet, recorded at the level of freshwater crayfish.Background and mechanism onlyCitation checked — the work exists and is described correctly
Golden perch
Recorded diet evidence identifies freshwater crayfish as a food item of this predator at group level rather than to species. The edge points at the taxon record for that reason, and encoding it as a species-level claim would assert something the source does not.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Food items recorded for this predator, given as freshwater crayfish.States this directlyPassage read and verified
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Species account describing this predator's diet, recorded at the level of freshwater crayfish.Background and mechanism onlyCitation checked — the work exists and is described correctly
Murray cod
Recorded diet evidence identifies freshwater crayfish as a food item of this predator at group level rather than to species. The edge points at the taxon record for that reason, and encoding it as a species-level claim would assert something the source does not.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Food items recorded for this predator, given as freshwater crayfish.States this directlyPassage read and verified
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Species account describing this predator's diet, recorded at the level of freshwater crayfish.Background and mechanism onlyCitation checked — the work exists and is described correctly
Smallmouth bass
Recorded diet evidence identifies freshwater crayfish as a food item of this predator at group level rather than to species. The edge points at the taxon record for that reason, and encoding it as a species-level claim would assert something the source does not.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Food items recorded for this predator, given as freshwater crayfish.States this directlyPassage read and verified
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Species account describing this predator's diet, recorded at the level of freshwater crayfish.Background and mechanism onlyCitation checked — the work exists and is described correctly
Spotted bass
Recorded diet evidence identifies freshwater crayfish as a food item of this predator at group level rather than to species. The edge points at the taxon record for that reason, and encoding it as a species-level claim would assert something the source does not.
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Food items recorded for this predator, given as freshwater crayfish.States this directlyPassage read and verified
- FAO Species Identification Guides for Fishery Purposes and the FAO Species Catalogues — Food and Agriculture Organization of the United Nations (Scientific institute)Relied on for: Species account describing this predator's diet, recorded at the level of freshwater crayfish.Background and mechanism onlyCitation checked — the work exists and is described correctly
Practitioner consensus — 1 connection
Widely and independently recommended by experienced anglers and specialist sources. This is real angling knowledge, not proof: controlled evidence for it is limited, and FishingHQ records it as convention rather than as a demonstrated effect.
White-clawed crayfish
An explainer that carries the mechanism the subject record depends on.
- Environment Agency fisheries management, byelaws and rod licensing information — Environment Agency (Government fisheries body)Relied on for: Freshwater fisheries management in England: species status, distribution, invasive species policy and biosecurity practice.States this directlyCitation checked — the work exists and is described correctly
- JNCC species and habitat conservation advice — Joint Nature Conservation Committee (Conservation authority)Relied on for: UK conservation designation and the status of protected and priority freshwater species and habitats.States this directlyCitation checked — the work exists and is described correctly
Check the rules before you fish
Fishing laws, bylaws, access rules, seasons, bait restrictions and permitted methods vary by location and can change. Check the current rules from the relevant authority and the water you intend to fish before fishing.
Check with:
- Current national or regional law for where you are fishing
- Current local bylaws
- The relevant fisheries authority
- The landowner, club or fishery whose water it is
- Any restrictions specific to the species or the method you intend to use
Sources for this page
- FishBase: a global information system on fishes — Froese, R. and D. Pauly, eds. — FishBase Consortium (Scientific institute)Relied on for: Recorded food items for the predatory species this taxon is cited as prey for, at the granularity the database records them.States this directlyPassage read and verified
- Check Clean Dry — biosecurity guidance for water users — GB Non-native Species Secretariat (Conservation authority)Relied on for: Guidance on non-native crayfish, disease transfer between waters and biosecurity practice.Background and mechanism onlyPassage read and verified
How FishingHQ labels evidence is explained in the evidence policy.