What a weird sea monster :V
Biomech sketches based on a Redoubtable-class SSBN, also specifically inspired after getting to see one in person
Sub biomechs look deceivingly organic since their basis form is quite simple, streamlined, and already arguably animal-like. The ones with anechoic “skin” look even more so since it disguises all the joints and seams and such. But they are fully mechanical underneath!
Also, it look like he is wearing a hat what is cool
I wish i was as good at drawing animal like anatomy as you are. Caus, damn, that there is really damn amazing!!!
Your skills are unbelivable.
Your Demis are much smaller than most of my creatures so they'd also look a lot more like they can walk around - this particular sub is semi-aquatic at most, they're quadrupedal but as a 8,000 ton biomechanical machine, that's a lot of mass to move around and would end up in a lot of wear and tear for not really much gain out on land. The limbs (and tail) are more used for being able to propel themselves more silently than by screw, and for underwater combat. (Even larger biomechs don't even bother to shape-shift at all since it takes way too much energy, so at most you'd see the vehicle form with the ability for selective active mutation.)
But your Demiships walk and swim, so even if they do have more of a gorilla shape, I'd imagine their mass is still more overall evenly distributed for buoyancy and for strength in the legs (they would use the legs while swimming, Demiplanes don't need their legs to fly at least from the designs I've seen from you.) Just kicking around thoughts! I'd love to see what you come up with especially the more unusually proportioned characters - there's so much one can do!