Excerpt: Puget Sound is home to not only salmon, orcas and the Giant Pacific Octopus, but so many other wonderful creatures, such as the Hooded Nudibranch. One of about 89 different species of nudibranch or sea slug in our waters, This is one of the very few in the world that can actually swim. They possess many unusual characteristics. They have both male and female reproductive organs. Their eggs, as many as 30,000 are fertilized internally. They can escape from predation by dropping one of their cerata, and there’s more.
Here is the article and underwater video: https://www.madeinpugetsound.org/blog/hooded-nudibranchs-of-puget-sound