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Opalescent Nudibranch

Hermissenda crassicornis

Photo by Machi
Published on Project Noah
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57.7788, -152.411

Field Notes

Description:

The white stripes shine with an opalescent blue tinge, hence the name. I have been hoping to see one of these for a long time, but I didn't realize they were in Alaska so I was taken by surprise! It was also larger than I was expecting, probably close to 3 inches (~7.5 cm) long

Habitat:

Found on the side of a concrete dock in a harbor

Reference Links:

Opalescent Nudibranch - Hermissenda crassicornis - Overview, The Sea Slug Forum - Hermissenda crassicornis

Species ID Suggestions

Comments (6)
Machi
Thanks Mark and Felix!
Machi
Thanks Jim and Christine! Jim, the dock was halfway sunken and only floating because it was chained to the main docks, so many animals were exposed that I think are normally a little deeper and more covered. It was a great opportunity to photograph some animals that are normally more awkward to photograph.
Jim Nelson
Machi...great photography and spotting. Usually you have to go deeper to find these guys.

Spotted for Missions

Mission
Opisthobranchs & Nudibranchs of the World
Mission
Mollusca
Mission
Alaska Fauna and Flora
Mission
Great Alaskan Challenge
Mission
2017 Best Wildlife Photo
Photographed
PublishedJune 28, 2017

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