Uttacha is a vengeful demigod who lives in the depths of an ocean on Valrei. These huge larvae are hungry and confused abominations here.
Butchering gives meat, 4kg of tar and an unique Valrei item [http://www.wurmonline.com/wiki/index.php?title=[Valrei_item]] such as: a Powerful Corpse; Shiny Jewel; Charming Opal.
http://i.imgur.com/DJFXY.jpg