ClipArt ETC
This hermit crab (Eupagurus bernhardus) is in the shell of the northern moon snail (Lunatia heros).

Hermit Crab

This hermit crab (Eupagurus bernhardus) is in the shell of the northern moon snail (Lunatia heros).

<em>Lunatia heros</em> or the Northern moon snail, the common salt-water snail of the Atlantic coast.

Northern Moon Snail

Lunatia heros or the Northern moon snail, the common salt-water snail of the Atlantic coast.