S. micropectoralis is known to be found in a marine environment within a demersal depth range of 20 – 260 meters.

This species is identified by its elongated, brown body with a white underside.

S. micropectoralis commonly occupy the areas of Indo-West Pacific, Andaman, South China seas, south to the Arafura Sea, and northern Australia.

It is common to find this species in the area of muddy bottoms of the continental shelf down to about 60 m (200 ft).

The diet of this species includes small bottom-dwelling invertebrates and fishes.