[quote=@MangoJuice]
They'd probably live anywhere on the map that is a moist forested area, like a wooded river or swamp. It's not over powered since they are very slow, and don't attack unless you touch their tentacles. They're very rare, being so large, but the exact numbers, as well as other things, are up to RPer interpretation. 
[/quote]
Based upon that, it seems okay to me as a player, but as a GM, I would like to hear other thoughts first, too.