thx you guy, i forget to specify that for this image i've used entirerly Zbrush (as for all my images in my gallery) and multipass renders to compose in Photoshop where i've added just the background. About lights Oskar, maybe you are right..anyway i'm not in search of photorealism at any cost. Thx for your suggestions naturally i'll keep it in mind.
Very cool. I have one reflection though (pun intended); when a slimy thing is already underwater you dont get much highlights. I have taken photos of jellyfish when I dived and they show no or very blurry highlights, even with a flash. What do you think?