User blog comment:Arbington/The Next Cycle/@comment-2250460-20120802012255/@comment-4950455-20120802020711

You misunderstand - my point was that thresher maws pretty much are apex predators, which gives them a lot less reason to evolve sentience. Tool use among humans has been speculated in real life to have developed at least partially as a hunting aid; I seriously doubt thresher maws need the help.