Nudibranchia

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Hermissenda crassicornis

Size:
Hermissenda crassicornis may be considered a smaller nudibranch reaching only approximately 50mm in length.

Armina californica

Size:
It grows up to 8 cm long, 2 cm wide.

Range:
Kayak Island, Gulf of Alaska to Panama. This specimen was found in Olympia, Washington (Puget Sound).