S. intermediusには下顎の先端に肉質突起がないこと,肩帯部上方に黒斑があることから本種と区別できる。(上野・藍澤)
Distinctive characters:
Body slender, cylindrical. Dorsal fin single, anterior to middle of body. Adipose fin present. Photophore absent. Lateral line present, scales not enlarged. Pelvic fin abdominal, rays 8; the inner rays much longer than outer rays. Anal fin origin much nearer to base of caudal fin than to insertion of pectoral fin, its base less than 18% of SL. Palatine teeth in a single low. Lateral-line scales 43〜48. Predorsal scales 13〜16. Anterior dorsal ray extending to, and usually beyond, tip of succeeding rays when depressed. Lower jaw symphysis with a fleshy knob. Side of body with about 8 obscure dark blotches; no black patch on shoulder girdle under gill cover.
Distribution:
Distributed from the Atlantic coast of North Carolina, U.S.A. to Brazil.
Remarks:
This species differs from S. intermedius by the presence of symphyseal knob, and absence of black patch on shoulder girdle under gill cover. (Uyeno and Aizawa)