单词	madtom
释义	madtom /ˈmɑdtɒm / noun A small North American freshwater catfish which has a venom gland at the base of the pectoral fin spines. Genus Noturus, family Ictaluridae: numerous species. Most of the species in this family are the small, stream-dwelling madtoms, which are relatively rare in the Northeast where Ameiurus and Ictalurus are more common.... The pygmy madtom is one of the rarest fishes in North America; only about 50 specimens have ever been collected. The slabrocks were also being used by several other darter species, as well as madtoms.
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