Layering Issue

this is what the model looks like in blender, made up of two seperate models


and this is what it looks like in unreal engine. the layers are all messed up and how do i fix this? im new thanks guys :slight_smile:
image

What do your normals look like? Hard to tell from those two images, but is it possible the main fish body has its faces reversed so you’re actually seeing the “inside” of the fish instead of the outside?