How large do most ostariophysan fishes grow?

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knifefish — ostariophysan Knifefish, or featherback (Xenomystus nigri)

Most ostariophysan fishes are small to moderate in size, typically ranging from 2 to 30 cm (about 1 to 12 inches) in length.1

While the majority of the group falls within this size range, some species are among the largest freshwater fishes in the world. For example, the mahseer can grow to 2 metres (about 7 feet) and weigh 90 kg (200 pounds), while the wels, a type of catfish, can reach lengths of 4.5 metres (15 feet) and weigh up to 300 kg (660 pounds).1