Glosso eaten

I recently noticed some GSA on some of my Glosso. On top of that I was thinking of slightly rearranging the scape. I cleaned my canister filters and uprooted some of my Glosso. Then I made some small cuttings from those Glosso. I chose those that looks healthy with nice looking shoots and replanted them.

3 days later I noticed over 90% of the Glosso shoots were gone. And tonite I saw one Black Skirt Tetra nibbling on some of them. However I am not able to see some clear evidence that I could put the blame onto those Tetras.

Anyway, were Black Skirt Tetras convicted before on this same crime