Ameiurus is a genus of catfishes in the family Ictaluridae. It contains the three common types of bullhead catfish found in waters of the United States, the black bullhead (Ameiurus melas), the brown bullhead (Ameiurus nebulosus), and the yellow bullhead (Ameiurus natalis), as well as other species, such as the white catfish (Ameiurus catus or Ictalurus catus), which are not typically called "bullheads".
Ameiurus is recognized as monophyletic, meaning it forms a natural group. It is mostly closely related to the clade formed by Noturus, Prietella, Satan, and Pylodictis genera.
There are seven extant (living) species and eight fossil species of Ameiurus. The oldest, Ameiurus pectinatus, gives a minimum age estimate for the genus at approximately 30 million years, during the Oligocene.
Living species of Ameiurus catfishes are natively distributed east of the North American continental divide, from their westernmost point in central Montana, south to Texas, in streams of the Gulf of Mexico and Atlantic Coast, north to New Brunswick and Quebec, Ontario, Manitoba, and Saskatchewan.
Bullheads live in a variety of habitats, including brackish and/or low oxygen ponds, rivers and lakes, although they are seldom stocked intentionally. They are bottom feeders and eat virtually anything edible, including dead fish, insects, other fish, grain, fruit, crayfish and more. Because of their limited use as food or sport, they are usually caught while trying to catch other fish, and few anglers pursue them specifically. Persons looking to catch bullheads will use the same baits as they would for channel catfish, including cut bait, chicken livers, blood-soaked meal, or other pungent baits. Like all catfish, bullheads have a sense of smell that is more developed than the best canine.
Bullheads do not get as large as the other US native catfishes, with averages sizes in the one to two-pound range and world record sizes well under 10 pounds.
All three major bullheads can be confused with other catfishes by novice anglers. Because they have an unforked tail, many people mistakenly think small flathead catfish are bullheads. Both have the squared tail, and can have a mottled, brown appearance (in the case of the brown bullhead), but the flathead lower lip protrudes farther than its upper lip and it has a flat or "shovel" head. They also have very different habits and habitat. Flatheads generally eat only live things, while bullheads will freely eat dead fish or other small animals. The flathead is more likely to be found at the bottom of dams or in gravel pits, while bullheads are found more often in the most brackish areas. Additionally, flatheads can reach weights well in excess of 100 pounds, while the current world's record for any bullhead is a black bullhead, recorded at 8 lb even (3.63 kg), while the average adult is perhaps two pounds. Brown and yellow bullheads are significantly smaller. They are considered rough fish by many, and are seldom caught for food, although they can be quite edible if caught in clear water and prepared correctly. In Minnesota, bullhead are important to commercial fishermen, who harvest about 1 million pounds a year.
Ameiurus is recognized as monophyletic, meaning it forms a natural group. It is mostly closely related to the clade formed by Noturus, Prietella, Satan, and Pylodictis genera.
There are seven extant (living) species and eight fossil species of Ameiurus. The oldest, Ameiurus pectinatus, gives a minimum age estimate for the genus at approximately 30 million years, during the Oligocene.
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Bullheads do not get as large as the other US native catfishes, with averages sizes in the one to two-pound range and world record sizes well under 10 pounds.
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