Crystal Cove State Park, Orange County, CA. 10-17-16. © Timothy Arehart

California Black Sea Hare

Aplysia vaccaria

Tectibranchiata: Aplysiidae

The largest Sea Slug. Native to northeast Pacific Sea California, United States and Baja California, Mexico, including the Sea of Cortez.

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~25 cm long. Exposed at low tide. Main Beach, Laguna Beach, Orange County, California. 01/07/08. © Sandy Dildine

Diver's Cove (subtidal), Laguna Beach, Orange County, California. 2007. © Sandy Dildine

With eggs. © Sandy Dildine

Laguna Beach, Orange County, CA. 01/21/08. ©
Peter J. Bryant


With much smaller California Sea Hare, Aplysia californica (lower). Crystal Cove State Park, Orange County, CA. 5-21-10. © Timothy Arehart

Crystal Cove State Park, Orange County, CA. 5-21-10. © Timothy Arehart

With eggs. Crystal Cove State Park, Orange County, CA. 5-26-16. © Timothy Arehart

Eggs. Crystal Cove State Park, Orange County, CA. 5-26-16. © Timothy Arehart