Grimrock

I am setting up a pen & paper version of LoG (for personal use only) and am trying to convert the Goromorgs. The question I have is to the anatomical structure of the Goromorgs' bodies. What do they look like under the cloaks? I had noticed that he robes are bound with a long chain and wondered if their bodies were masses of tentacles and the chains gave them a humanoid shape. Are they just large masses of tentacles or is there a more humanoid body underneath? I would appreciate an informed response from one of the game designers if possible, but any help would be appreciated. Thanks.

Anyone have ideas as to where they look like a mindflayer:

or perhaps more like this: