User blog comment:The Reptile King/Reptile Kingdom Wildlife/@comment-26517142-20160906140543/@comment-27950421-20160906145922

All of the ships and major cities are equipped with a giant gong. Mohrans hunt primarily through hearing and have very sensitive ears so ringing that gong is usually enough to overwhelm their senses and send them off to find less painful things to eat. There's also the fact they aren't hard to spot if you know what to look for. They're almost always followed by smaller predators hoping to feed off of their scraps. These smaller predators have a smaller lung capacity so they come to the surface more often. If you see a shit ton of subterranean carnivores surfacing for air in the same area, that's probably where a Mohran is at.