So, could it actually do that? It's a jawless fish, so i was under the impression it slorped up stuff than eat anything solid.
You could maybe shove the carrot in there it was small enough, they only got to be 10 inches / 25 cm long, and their mouths weren't that big. Once it was in there though Sacabambaspis would just have a bad time. It couldn't eat the carrot, nor could it eat anything else, since there'd be a carrot clogging its mouth hole shut.