Loading species data...
Fetching observations
Garden Snail
Cornu aspersum
32,032 observations
Opalescent Nudibranch
Hermissenda opalescens
19,370 observations
Button's Banana Slug
Ariolimax buttoni
16,233 observations
California Mussel
Mytilus californianus
14,121 observations
Spotted Dorid
Triopha maculata
11,089 observations
Milk Snail
Otala lactea
10,904 observations
Pacific Banana Slug
Ariolimax columbianus
9,659 observations
Hopkins' Rose Nudibranch
Ceratodoris rosacea
9,341 observations
California Seahare
Aplysia californica
8,760 observations
Black Tegula
Tegula funebralis
8,727 observations
San Diego Dorid
Diaulula sandiegensis
8,639 observations
Monterey Dorid
Doris montereyensis
7,544 observations
Wavy Turban
Megastraea undosa
7,103 observations
Slender Banana Slug
Ariolimax dolichophallus
6,749 observations
Mossy Chiton
Mopalia muscosa
6,190 observations
Gumboot Chiton
Cryptochiton stelleri
6,088 observations
California Spiny Chiton
Nuttallina californica
5,355 observations
Hilton's Aeolid
Phidiana hiltoni
5,187 observations
Owl Limpet
Lottia gigantea
5,170 observations
Noble Dorid
Peltodoris nobilis
5,022 observations
California Aglaja
Navanax inermis
4,908 observations
Clown Dorid
Triopha catalinae
4,537 observations
Giant Keyhole Limpet
Megathura crenulata
4,496 observations
Red Sponge Dorid
Rostanga pulchra
4,367 observations
White-speckled Dorid
Doriopsilla fulva
4,267 observations
Spanish Shawl
Flabellinopsis iodinea
4,209 observations
White-spotted Sea Goddess
Doriopsilla albopunctata
4,020 observations
Salt-and-pepper Doris
Aegires albopunctatus
3,993 observations
Giant Rock Scallop
Crassadoma gigantea
3,918 observations
California Banana Slug
Ariolimax californicus
3,822 observations
Decollate Snail
Rumina decollata
3,749 observations
Sorcerer's Dorid
Polycera atra
3,581 observations
Branched Dendronotid
Dendronotus venustus
3,503 observations
Black Seahare
Aplysia vaccaria
3,477 observations
Norris's Topsnail
Norrisia norrisii
3,371 observations
Gould Beanclam
Donax gouldii
3,357 observations
Fisher's Aeolid
Orienthella piunca
3,270 observations
Yellow Cellar Slug
Limacus flavus
3,147 observations
Milky Slug
Deroceras reticulatum
3,096 observations
Red Abalone
Haliotis rufescens
3,030 observations
Purple Olive Snail
Callianax biplicata
2,947 observations
Pismo Clam
Tivela stultorum
2,944 observations
Colorful Dirona
Dirona picta
2,940 observations
McDonald's Dorid
Limacia mcdonaldi
2,688 observations
Rough Limpet
Lottia scabra
2,670 observations
Kellet's Whelk
Kelletia kelletii
2,636 observations
California Cone
Californiconus californicus
2,621 observations
Lesser Two-spot Octopus
Octopus bimaculoides
2,550 observations
Volcano Keyhole Limpet
Fissurella volcano
2,518 observations
Stubby Dendronotid
Dendronotus subramosus
2,510 observations
Frequently Asked Questions
- The 10 most common molluscs in California are:
- Garden Snail (Cornu aspersum)
- Opalescent Nudibranch (Hermissenda opalescens)
- Button's Banana Slug (Ariolimax buttoni)
- California Mussel (Mytilus californianus)
- Spotted Dorid (Triopha maculata)
- Milk Snail (Otala lactea)
- Pacific Banana Slug (Ariolimax columbianus)
- Hopkins' Rose Nudibranch (Ceratodoris rosacea)
- California Seahare (Aplysia californica)
- Black Tegula (Tegula funebralis)
- The most observed mollusc in California is Garden Snail (Cornu aspersum), with 32,032 recorded observations.
- Some of the most commonly observed native molluscs in California include:
- Spotted Dorid (Triopha maculata)
- Hopkins' Rose Nudibranch (Ceratodoris rosacea)
- California Seahare (Aplysia californica)
- Wavy Turban (Megastraea undosa)
- California Spiny Chiton (Nuttallina californica)