I looked at google images. Is this grape calerpa ya'll are talking about? If it is my it is, my fishes love it. I put grape on my clip at least once a week. I had a scribble rabbit fish that I couldn't get to eat off the clip. Then, I was messing with my fuge and some flew in and he was all about it. then, I put it on the clip with some nori and that is how I got him to eat nori off the clip.
Yuki