This about 1 mm dinoflagellate Noctiluca scintillans I found in the sample of seawater from the Dutch coast of the Northsea.
These cause the glowing of the sea by bioluminescence.
When I tap with my finger against the sample in total darkness I see a lot of green firework sparkles. Very nice to see.
May be the 2nd image a "tadpole" larva of a tunicate?
Just the following stage to the embryo: http://www.photomacrography.net/forum/v ... hp?t=14861
If you google for tunicate larva images you can find someones looking very similar. Do yo have more images of it?
The longish appendix is Noctiluca's tentacle that, according to the literature, is used for the ingestion of food particles.
But I can see why Pau is thinking of tunicata, in the second pic the tentacle and its rooting in the body strongly reminds of a tunicate larva , or an adult of the Tunicata: Appendicularia.
--Betty
Last edited by Planapo on Sun Oct 23, 2011 11:21 am, edited 1 time in total.