Other Invertebrates of San Franscisco Bay Area

On this page we have collected invertebrate species not included in any of the other groups.

• Millipedes and Centipedes
• Gastropod - Snails, Slugs
• Cephalopods - Octopi, Squid
• Bivalves - Oysters, Clams, Mussels
• Marine Creatures - Jellyfish
• Articles/Links

• Millipede - Xystocheir dissecta
• Yellow-spotted Millipede - Harpaphe haydeniana
  Gives off an almond scent (from hydrogen cyanide) when threatened.
• Millipede - Tylobolus
• Stone Centipede - Lithobiomorpha
• Soil Centipede - Geophilomorpha

Links

• A Guide to Identifying California Centipede Orders  ...link 

• Pacific Banana Slug - Ariolimax columbianus
• Slender Banana Slug - Ariolimax dolichophallus
  Photos of Banana Slugs in Big Basin State Park  ...link 
• California Horn Snail - Cerithidea californica
• Black Abalone - Haliotis cracherodii (endangered)
  They are large marine snails with smooth shells colored in shades of dark green, blue, or black.

Links

• Land Snails and Slugs of San Francisco by iNaturalist. List with photographs of most species.
• Slugs: A Guide to the Invasive and Native Fauna of California by University of California, Division of Agriculture and Natural Resources. Identification keys and illustrated with photographs.  ...link 

• East Pacific Red Octopus - Octopus rubescens
• Opalescent Inshore (Market) Squid - Doryteuthis opalescens

• Olympia Oyster - Ostrea lurida
  The only native oyster on the West Coast. Restoration efforts under way in San Francisco Bay.
• California Mussel - Mytilus californianus
  They are often found in massive clustered growths attached to rocks.

Links

• A Guide to Olympia Oyster Restoration and Conservation by San Francisco Bay National Estuarine Research Reserve  ...link 

• Purple-striped Jelly - Chrysaora colorata
• By-the-wind-sailor - Velella velella
  They suddenly appear in large numbers on Bay Area beaches.

• Quick Guide to Pacific Coast Gelatinous Animals  ...link 
• Guide to exotic marine species (invaders) in San Francisco Bay by the San Francisco Estuary Institute.  ...link