I went to my local fish store the other day, and saw a tank with 2 seahorses in it, and about 5 of these little snake-like things in it.
They were VERY thin, only 2mm, but quite long - 5", and their bodies were black/white stripes, with a pink tail at one end. They looked just like a piece of string!
I'm wanting to do some research on them but I can't for the life in me remember what they're called!
Anyone any ideas?