Project Description

The leafy hornmouth (Ceratostoma foliatum) has three wing-like processes that extend from its shell.  If a leafy hornmouth gets dislodged from a rock and falls down through water, the wing-like processes help to orient the shell so that it lands on the bottom with the opening facing downward.  This helps the snail avoid predation and also quickly get a firm foothold on a new surface.  The leafy hornmouth grows to four inches (10 cm) in length, with a range from central Alaska to southern California.