Living in a primordial cave. Over my playthrough I've noticed a growing number of Tremosaurs. They were initially rare but it is now comical how many there are. They have easily become the most common mob in the biome, I assume this isn't intended? I've attached a screenshot to show the kind of numbers I'm talking about.

ecosystem is ruined after local player disrupts landscape

lol

Ive been having this same issue on my server

This might be happening because of an amber monolith spawning them in.