ID? Found in Tacoma WA

In Tacoma, WA, an intriguing organism was discovered in the intertidal zone beneath a dock, surrounded by a vibrant community of nudibranchs and sea stars. Initially mistaken for a cluster of small worms, it was later identified as a single organism with a distinct body hidden beneath its pink, worm-like exterior. This observation raises questions about its classification, potentially linking it to lesser-known nudibranch species. Insight into this organism’s identity would be greatly appreciated, given its unique characteristics and the biodiversity of the area.