There are some gorgeous blue-tinted Nereids that sometimes show up on the coasts locally. I'm not new to the group broadly, but would not be able to do species or epitoke IDs. This one had a fair bit more of a mouth on it when extended than the ones I've poked at in the past. It is done now though, as it was definitely was an epitoke. It did its reproductive thing in the container I had it in all of a sudden and then died and mostly disintegrated immediately. Now I have a nasty mess to deal with when I get home...I forgot to throw it out, so it sat overnight.