Spike, my male green Sev seems to have developed a taste for Tiger Barb eyes! to be fair the tiger barbs are getting old and a little weak and Spike only picks on them if they are on their last legs. i found a dead Tiger Barb with a missing eye 2 weeks ago and i watched Spike munch another one today.
to be honest i would like to get rid of the Tiger Barbs and Spike is doing me a favour but its not the ideal situation really, he just seems to sense that the fish is weak and takes advantage of it.