Rethinking how I feed nori ..

[Delphinus]

I had been folding. The issue was in the way the tang would eat the nori. If he grabbed the end there was no problem. If he grabbed at any part in the middle, the end part would get torn off and float away. By wrapping around a pipe, the only part that can be eaten is at the outside edge no matter what.

A unfolded sheet was even worse. I'd end up with a square of nori flying around in the current and the fish was too scared of the flying nori to even chase after it. Happy times.