Texture is quite flat, not much detail. I am aware that there is, but it's not very well done, and the colors are so close together that it's basically not noticable. Also, I feel that the entire shell should just be one element, as what you currently have both isn't very Vanilla styled and is inaccurate (technically the middle of the shell would be a tiny bit skinnier than the outside, it wouldn't bulge).

nice

this should be in vanilla Minecraft

awesome re-creation :)