The Man-of-war Fish (Nomeus gronovii) also known as drift fish or shephard fish has a silver background with numerous blackish blue blotches over its body. One identifying trait is the out of proportion pelvic fins.
The Man-of-War Fish ranges in various parts of the Atlantic, Pacific and Indian Oceans.
The Man-of-War Fish gets its name from the fact that it often lives among the deadly stinging tentacles of the Portuguese man-of-war. This no doubt provides the Man-of-War Fish with plenty of protection and probaly helps the Portuguese man-of-war as well by enticing other fish to swim among the tentacles.