Myriapora truncata

João Pedro Silva A strange association: 'Felimida' luteorosea crawling (for about an hour...) all over Myriapora truncata.

João Pedro Silva Even stranger, less than 1m away, another one doing the same: http://www.flickr.com/photos/jpsilva1971/7651839804/ Coincidence? Possibly...

Joanne Porter Do you think the slug is laying eggs on the Myriapora?

João Pedro Silva I followed it for about 60 minutes and it wasn't laying eggs, at least not at that time. It was crawling around the "branches" of the bryozoan but not turning left like it does typically while spawning. To make this even more mysterious, less than 50cm away there was a smaller one doing the same: http://www.flickr.com/photos/jpsilva1971/7651839804/ The eggs seen in this 2nd photo do not appear to be from F. luteorosea.

Tony Gilbert Interesting shot Joao. Are you compiling a list of food preferences for the Portuguese nudibranchs?

João Pedro Silva Food is well known for most of our species, so I haven't thought about doing a more serious compilation. Apart from putting the photos with animals feeding on a specific set on Flickr (when it's obvious they're feeding) or mentioning what kind of animals they prey upon I'm not doing such a list. There is a global compilation however based on published literature: http://www.theveliger.org/nudibranch_food.html Some older references have either misidentified the prey or just mention the animal was found on so and so (and jump to the conclusion it was feeding upon that particular animal, like these F. luteorosea on M. truncata). For a few species food is still a bit of a mystery.

João Pedro Silva Here's my "Feeding" set: http://www.flickr.com/photos/jpsilva1971/sets/72157626595504483/ It includes a couple of photos of Marionia blainvillea eating Paralcyonium spinulosum (I actually saw the slug biting large chunks from the top of the colonies) which I think was not documented yet.