The size of the shell varies between and . The shell is a little inflated and distantly grooved below. The
spire is striate and somewhat convex. The shell is white, longitudinally marbled and flecked with dull blue or purple. It captures its prey by using the "
taser-and-tether" (harpoon) strategy. This means it stuns its prey by using venom and extends a
proboscis from its
rostrum and "hooks" the fish, the same way a
harpoon would. ==Distribution and habitat==