Project Description

Giant acorn barnacle (Balanus nubilus) shell plates help protect the majority of these fish eggs from predation.  The eggs are mostly protected within the remains of a giant acorn barnacle, but a red rock crab has been lucky enough to scoop a few out for a meal.  The giant acorn barnacle is very large, growing to six inches (15 cm) across.  These barnacles may be solitary or live in large clusters, with a range from southern Alaska to northern Mexico.