Sargassum fish are present; the gills open as pores near the base of the pectoral fins. The anal fin has no spines and seven to 13 soft rays. The pelvic fins are large and the pectoral fins have 9-11 rays and are stalked and able to grip objects. The outer rays of the tail fin are simple, but the central rays are forked. The sargassum fish has a cosmopolitan distribution in tropical and subtropical seas down to a depth around . It is found in parts of the Atlantic Ocean and the Indo-Pacific Ocean, where drifting seaweed accumulates. In the western Atlantic,
Sargassum muticum around the farming structures, requiring additional maintenance. It also gets entangled with the propellers of the boats. Mechanical removal—however this promotes dissemination of the species and the technique is labor-intensive. Chemical—the use of herbicides is advised against, because it poses a major risk to the environment and others organisms. Biological—there are few natural predators, one example is a little copepod that will eat only the unhealthy and damaged parts of "S. muticum." Currently the distribution is stabilized, and only mechanical removal is performed. There are some potential uses for "Sargassum muticum." In agriculture, algae are used as sources of nitrate