Wow. This is really magnificent work!! I just had a look through the Wikipedia article of Platynereis dumerilii and I can see from the citation list that you have quite a story with these guys 😁 It is very neat to see how you were figuring out this worm’s phototaxis in 2008 and by now you have figured out a map of the whole thing.

Looking at the movie and the paper I am very intrigued and also a bit intimidated by the complexity! I would really like to get five minutes to experience this worm through your eyes. I will set some time to go through this paper carefully and try to benefit a little bit from your insight.

Thanks a lot for sharing this here, it really is a privilege! Very very cool stuff.