Black bullhead
The small, spiny, invasive American catfish that bites on almost anything.
The black bullhead is a small North American catfish that was introduced to Europe in the late 19th century and has since colonised ponds, canals and slow rivers across the Danube basin, Germany, Hungary and the Balkans. Anglers have mixed feelings about it: it is an invasive pest that crowds out native fish, yet it is also the easiest catfish to catch and a great first fish for children.
Bullhead catfish · Black bullhead catfish · Dwarf catfish · American dwarf catfish · Bullhead · Horned pout
Quick facts
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How to identify it
A stocky, scaleless catfish with a broad head, small eyes and eight barbels: four under the chin, two at the corners of the mouth and two on the snout. The back is dark brown to black, the flanks bronze or olive, the belly yellowish to white; the chin barbels are dark. The tail fin is square or slightly notched, never forked, and a small adipose fin sits behind the dorsal. Each pectoral fin and the dorsal fin carry a sharp, locking spine that punctures skin. A young wels has only six barbels and no spines; the channel catfish has a forked tail and spots. The brown bullhead is very similar but has strongly serrated pectoral spines and mottled flanks.
Where it lives
Black bullheads thrive where other fish struggle: shallow, muddy, weedy ponds, oxbow lakes, backwaters, drainage canals, gravel pits, fishponds and the slow margins of lowland rivers. They tolerate warm water, low oxygen, silt and turbidity, and can survive in pools that shrink to almost nothing in summer, which is why they spread so easily through flooding and pond stocking. They are bottom fish, holding over soft mud near reed beds, sunken branches, culverts and inflows, usually in water less than 2–3 m deep. Where they establish, they form dense shoals of stunted, hand-sized fish; in richer waters with predators they grow larger but fewer.
Season and behaviour
Bullheads are warm-season fish. They stay half-dormant in the mud through winter and begin feeding when the water passes 12–15 °C in April, peaking from May to September when the water is warmest. Spawning takes place in May–July at 20 °C or more: the pair excavates a nest in mud or under roots, and the parents guard the eggs and shepherd the black cloud of fry, a behaviour no native European fish of this kind shows. They feed mostly at dusk and night using smell and touch, but in coloured water and in dense populations they bite all day. Feeding drops off in October and stops when the water cools below about 10 °C.
Fishing methods
No specialist tackle is required. A light float rod with 0.16–0.20 mm line, a small waggler or pole float and a size 8–12 hook, fished with the bait lying on the bottom or an inch above it, catches bullheads all day. Light ledger or feeder rigs with a small lead and a short hooklink work just as well in canals and rivers, and a bite is usually a series of tugs that turns into a steady pull. Fish near reeds, overhanging branches, culverts and inflows, and groundbait lightly with fishmeal or bread to hold the shoal. Handle every fish carefully: grip it from above, pressing the pectoral spines flat, or use a disgorger and a cloth. Where the species is invasive, most authorities ask that you do not return it alive.
Baits and lures
Black bullheads eat almost anything that smells: worms are the number one bait, followed by maggots, casters, pieces of fish, chicken liver, cheese, luncheon meat, sweetcorn and bread paste. Fishmeal pellets and boilies intended for carp are taken readily, which is why carp anglers often meet them uninvited. A strong smell matters more than presentation — a bunch of maggots or a lobworm chunk on the bottom will not stay untouched for long where bullheads are present. They rarely take lures, though a tiny jig tipped with worm can catch them.
Tips from the bank
- 01Fish the bait hard on the bottom — bullheads feed by touch and smell along the mud, not in mid-water.
- 02Hold the fish from above with your fingers behind the pectoral fins so the spines cannot lock into your hand.
- 03Use hooks with a longer shank or a disgorger; bullheads swallow bait deep.
- 04Target warm, muddy, weedy corners of the pond and the shade of overhanging branches at dusk.
- 05In waters where they are invasive, check the rules — releasing them is often prohibited and removal is encouraged.
- 06A pinch of fishmeal groundbait or a few crushed pellets will pull a whole shoal under your float within minutes.
- 07If bullheads keep stealing your carp bait, upsize to hard baits and larger hooks, or move to deeper water.
Regulations
The black bullhead is classed as an invasive alien species in most European countries where it occurs; it typically has no closed season or minimum size, and many regulations prohibit releasing it alive or transporting it to other waters. Rules differ by country and by individual water, so always check the current regulations for the exact spot before you fish. Shoalmap shows the rules for each water in the app.
Where to catch Black bullhead
Waters where Shoalmap's fishing reports list Black bullhead.
Find Black bullhead waters near you →Related species
- Wels catfishSilurus glanis
Europe's biggest freshwater fish — a night-feeding giant of deep, slow rivers.
- Channel catfishIctalurus punctatus
North America's favourite catfish, now a night-feeding guest in a few European waters.
- PumpkinseedLepomis gibbosus
The dazzling North American sunfish that has colonised Europe's warm shallows.
- Prussian carpCarassius gibelio
The tough, silvery all-rounder that fills every lowland water in the Danube basin.
Frequently asked questions
Is the black bullhead dangerous to handle?
Not seriously, but the sharp spines in the pectoral and dorsal fins can puncture skin and cause a painful, sometimes infected wound. Grip the fish from above with your fingers behind the pectoral fins, use a cloth and clean any puncture.
How big do black bullheads get?
In most European waters they stay small, 15–30 cm and under half a kilo, because they overpopulate. Fish of 40–45 cm turn up in richer waters with predators; the commonly cited maximum is about 60 cm and around 3 kg.
How do I tell a black bullhead from a young wels catfish?
Count the barbels and feel for spines: the bullhead has eight barbels and a sharp, locking spine in each pectoral fin and in the dorsal fin. The wels has six barbels, no spines, and a very long anal fin that reaches almost to the tail.
Can you eat black bullhead?
Yes. The flesh is white, firm and mild, and in Hungary, Serbia and northern Italy bullheads are fried whole or cooked in paprika stews. Skin them before cooking; a few larger fish from clean water make a better meal than many stunted ones.
Why are black bullheads a problem?
They breed fast, guard their young, tolerate poor water and eat the eggs and fry of native fish, so a small pond can be dominated by thousands of stunted bullheads within a few years. That is why most countries list them as invasive and discourage releasing them.
Find Black bullhead near you
Shoalmap searches every reported water around you for Black bullhead, scores today's catch odds and shows the closed season and minimum size that apply.
Search Black bullhead watersFishing information is compiled from public sources and AI-assisted research and is indicative only. Always verify current local regulations before you fish.