The shell of this species is globular and can, under the right conditions, grow up to 125 mm (4.9 in) long.

The operculum is large, ear-shaped in outline, and is corneous and somewhat transparent.

Euspira heros lives on sand substrates in infralittoral, and circalittoral parts and estuary.

The powerful foot enables this gastropod to plow under the sand in search of other mollusks.

Upon finding one, it "drills" a hole into the shell with its radula, releases digestive enzymes, and sucks out the somewhat predigested contents.