M. americanus
# M. americanus

M. americanus may refer to:

* Menticirrhus americanus, a kingcroaker species in the genus Menticirrhus
* Merganser americanus, a duck species
* Metasiro americanus, a harvestman species in the genus Metasiro
* Monomitopus americanus, an eel species in the genus Monomitopus
* Morone americanus, a bass species
