FIX THE MODEL BEFORE PUTTING INTO MUDBOX

I was still so beginner at modelling. Well, lots of mistake for sure, never mind! Time to fix them.

Holes between fingers! I did create the fin and fingers but couldn't extrude them well. Therefore, I cut off some faces to somehow stretch out the other faces; complex to explain but here how messy that I've got.

I used "Append Polygon Tools" to fill the hole

 Then when it comes to the body, it is separated or is mirrored actually. So I deleted all the history and used mesh/combine them... Distanced two halves a bit to be able to see vertices. I stitched the crack using "merge vertex tool"