We isolated a Mycobacterium sp. resembling Mycobacterium marinum and M. ulc
erans from diseased striped bass (Morone saxatilis) during an epizootic of
mycobacteriosis in the Chesapeake Bay. This isolate may represent an undesc
ribed Mycobacterium species, based on phenotypic characteristics and compar
ative 16S rRNA gene sequence.