Black Bullhead

Fascinating facts about the Black Bullhead

• A black bullhead that hits the 24-inch mark (61 cm) is the biggest of all bullhead catfish, yet most adults stay between 6 and 14 inches (15–36 cm) and weigh just 1–2 lb (0.45–0.91 kg). That modest size lets them hide in murky backwaters where larger predators can’t follow.
• Even without scales, a black bullhead can taste its world with about 100,000 receptors spread over its skin and especially its black barbels, letting it locate food in the dark night-time waters it prefers.
• When winter freezes food supplies, these catfish “hibernate” by burying themselves in shoreline debris and exposing only their gills, a trick that lets them survive low oxygen and near-freezing temperatures without eating for months.
• During the spring, females dig nests 0.6–1.2 m (2.0–3.9 ft) deep in mud or sand, guard the gelatinous egg mass, and the eggs hatch in just five to ten days depending on water temperature, an unusually rapid start for a fish that later guards its young until they reach 25 mm (0.98 in).
• In the United Kingdom, the only recorded population at Lake Meadows, Essex, never grew larger than 1.19 lb (0.539 kg) before eradication, underscoring how invasive black bullheads can stay surprisingly small even when they threaten native ecosystems.

At a glance

About the Black Bullhead

The black bullhead (Ameiurus melas) is a squat, bottom-roving catfish whose dark, almost black dorsal hue fades to a yellow-white ventrum, a coloration that deepens in the murky waters of the central and southern United States where it thrives. Its most distinctive features are the jet-black barbels that fringe its mouth, a tan crescent that rims its truncated, square-shaped tail, and a set of spiny pectoral and dorsal fin rays that can be used as defensive spurs. Growing to a typical length of 6–14 inches (15–36 cm) and weighing 1–2 lb (0.45–0.91 kg), it is the largest of the bullheads, with the record specimen reaching 24 inches (61 cm). Adapted to low-oxygen, silty, and warm habitats, it inhabits stagnant lakes, ponds, oxbows, and slow-moving streams, often congregating under dams or at lake outlets where the water is still and the bottom soft. Its nocturnal habits see it lie inert among vegetation by day, then surge out at night to forage on an omnivorous menu of grains, insects, crustaceans, and even small fish or eggs. Around 100,000 taste receptors cover its scaleless skin, especially concentrated on its barbels, allowing it to detect food in the dark. In winter, the black bullhead can enter a state of “hibernation,” burying itself in shoreline debris with only its gills exposed, a surprising survival strategy that lets it endure low-oxygen, low-temperature conditions until spring awakens its spawning drive. Spawning begins in April and can continue through June, sometimes as late as August at higher latitudes, with females excavating shallow mud nests where both parents guard the gelatinous egg mass for five to ten days before the fry emerge and form a compact school under the watchful circles of their parents.

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