Hypomesus
Hypomesus is a genus of smelts (Osmeridae), consisting of five species found in the northern hemisphere. Species. There are currently five recognized species in this genus: The pond smelt "H. olidus" is widespread across northeastern Asia, Alaska, and northwestern Canada, while the Delta smelt "H. transpacificus" is an endangered species of the Sacramento Delta in California. " H. chishimaensis" was at one time thought to be a separate species, but has since been identified as a population of "H. nipponensis".