Please ID these four critters

[julien]

I've just got my LR and found those critters... Can you ID them please:


Small green thing:

http://i23.photobucket.com/albums/b380/julien_/thing1.jpg


Small purple spikes:
http://i23.photobucket.com/albums/b380/julien_/thing2.jpg


Probably a tube worm:
http://i23.photobucket.com/albums/b380/julien_/thing3.jpg


Some king of worm, it appears to be eating algae:
http://i23.photobucket.com/albums/b380/julien_/thing4.jpg


Finally, what it this coral growing on the rock:
http://i23.photobucket.com/albums/b380/julien_/sP1040428.jpg

Thanks!

Julien

[Victoly]

#3 looks like a feather duster worm. #4 looks like a peanut worm to me.

[cutsupremetrib]

that last coral pic looks dead not sure on other stuff

[bertoni]

Dr Shimek might be able to help with the last shot in his forum. The other pictures need to be sharper and perhaps larger for me to say much.

[theatrus]

#1 and #2 look like small bunches of different kinds of algae. #2 is probably the red kind which grows in branching mats. I have a fair bit of it which I pull out periodicaly.