phylum
Mollusks
Mollusca
Field notes
Children
Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Most observed native mollusks All
Native to the US, by observations.
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California Mussel
Mytilus californianus
24,163 observations
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White-lipped Snail
Cepaea hortensis
23,247 observations
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Eastern Oyster
Crassostrea virginica
18,275 observations
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Monterey Dorid
Doris montereyensis
17,809 observations
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Button's Banana Slug
Ariolimax buttoni
17,044 observations
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Mossy Chiton
Mopalia muscosa
17,020 observations
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Blue Mussel
Mytilus edulis
14,053 observations
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Pacific Sideband
Monadenia fidelis
13,902 observations
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Meadow Slug
Deroceras laeve
13,467 observations
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Acute Bladder Snail
Physella acuta
12,641 observations
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Black Tegula
Tegula funebralis
12,433 observations
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Spotted Dorid
Triopha maculata
12,059 observations
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Changeable Mantleslug
Megapallifera mutabilis
11,412 observations
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Hopkins' Rose Nudibranch
Ceratodoris rosacea
11,031 observations
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Gumboot Chiton
Cryptochiton stelleri
10,955 observations