sea apple?

[flickrvideo]6876570018[/flickrvideo]

I thought sea apple feeds primarily on plankton but this one feeding fish!

footage taken in Ambon, Indonesia.

You're half right - sea apples do feed on plankton and half wrong - it's not a sea apple. Those are echinoderms - holothuroids in the genera Paracucumaria and Pseudocolochirus. The critter in your video is a sea anemone in the family Actinodendronidae, possibly Actinostephanus haeckeli. The two images at the bottom are of haeckeli - http://web.nhm.ku.edu/inverts/adorian/actinodendronidae.htm Actinodendronid anemones have really powerful nematocysts and as you saw, are quite capable of catching fish.

Thanks a lot Leslie.