Weird hitch hiker.. anyone help?

[new2salt3]

I saw this on a zoo and looked like a worm so I took it out and took a picture of it. 5 mins later, I went back to it and it fell apart. I saw him moving around in the tank for a few days and could never catch a sec look at him... it was like one of those rang weeds when you peel the wheat off, it falls apart..lol best way I can explain it...
thanks!

 

[spanko]

A nudibranch. Probably a zoa eater. They take on the color of the zoas they are munching on.

 

[new2salt3]

grrr.... thanks so much! Those zoas aren't cheap, ya know! lol

 

[mr.clownfish]

if u find one then u will find more, if i was u i would dip the zoos in fresh water

 

[new2salt3]

We are bummed out since we bought over 30 beautiful blue's @ $10. ea and this critter has left us about 12 left.