Project Description

The horned nudibranch (Hermissenda crassicornis) has an orange stripe on its head surrounded by a blue line that continues along the oral tentacles.  Another feature is a white line that extends along each cerata on the nudibranch’s dorsal surface.  The horned nudibranch can grow to around 3 inches (8 cm) in length, with a range from southern Alaska to central California.