Did you get inspiration for this from warhammer 40k tyranids? I really have to ask, cuz there's a huge resemblance. looks like it could be used as an aquatic bio-titan. I especially love the maniacal grin on its face! Anyway it's sweet! good work!
Done on Photoshop, mostly with the Dodge, Burn, and Sponge tools. Done from scratch, no photo manipulations. The different colors are simply a bit of messing around with the hue/saturation and color balances. Took alot of work, and i wish i could have detailed the shell a bit more, but all in all didnt turn out half bad... Unfortunately the uploaded pic doesnt show the microscopic detail i did. haha. ill try a second upload for that though.