dog that obscures the main barred pattern. In B. bagarius, the pelvic fin origin is normally anterior to a vertical line through the base of the last dorsal fin ray, while in B. yarelli the pelvic fin origin is posterior to this vertical line. Also, in most B. bagarius, the adipose fin originates far back over the anal fin, on a vertical through the base of the third or four anal fin ray. However, in most B. yarelli, the adipose fin originates near or in front of a vertical line through the anal fin origin. In B. suchus, the adipose fin originates even further back than in B. bagarius or B. yarelli. B. suchus tends to have a flatter head and body than either B. bagarius or B. yarelli. B. bagarius does not grow much past 20 centimetres (7.9 in) SL. B. rutilus grows to about 100.0 cm (39.4 in) SL. B. suchus grows to about 70.0 cm (27.6 in) SL. B. yarelli grows very large, reaching about 200 cm (78.7 in) SL. Ecology B. bagarius inhabits rapid and rocky pools of large and medium-sized rivers. B. suchus is usually associated with rapids in the large rivers it inhabits. B. yarelli occurs in large rivers on the bottom, even with swift current, never entering small streams. It is found among boulders, often in the white water of the rapids where it apparently is indifferent to the strong current. B. bagarius is primarily entomophagous. It also feeds on small fishes, frogs and shrimps. B. suchus, however, is a piscivore. B. yarelli feeds primarily on prawns but also eat small fishes and aquatic insects. B. bagarius breeds in rivers prior to the beginning of the annual flood season. B. yarelli migrates in schools. It is reported to migrate to follow its prey. It is also reported that it follows Catlocarpio siamensis during its upstream migration. Apparently the main upstream migration begins close to the peak of flood, when the current is very strong and the water is turbid. Relationship to humans Bagarius species are marketed fresh, and are important as a food fish, but the meat spoils rapidly and can cause illness. The Goonch catfish B. yarrelli has become an object of media attention as reports have surfaced of some of these fish feeding on funeral pyres in the Kali River. There is speculation that some drownings have also been caused by