Opsarius bernatziki is a fish in the Opsarius genus of the family Danionidae. It is found in Thailand, Southeast Myanmar, and the Malay Peninsula. It is associated with a freshwater habitat and can grow up to 9.1 cm.
Etymology The fish is named in honor of Hugo Bernatzik (1897–1953), an Austrian anthropologist, photographer and a travel writer, who collected the holotype specimen.
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