AFAIK, gulpers don't eat other gulpers.
It'd appear gulpers are an easy prey. They don't seem to comprehend the need to swim away or hide
I couldn't agree more.
My suspicion is that they don't have to swim away or hide. There must be some sort of a passive defense mechanism. They don't eat each other. They look totally vulnerable, yet, I have never come across a single case of where another fish ate a gulper.
One might think that in the /\/\onster communities we have here, where people know to keep gulpers with other fish at least twice the gulper's size, at some point, the larger monsters would've tried to eat the gulper.
Yet, we don't have a single reported case.
Makes me wonder...