Different morphs have different belly markings: just a few basics is that pastels should have clear white bellies without the little checker markings and yellowbellies have lots of "ticking" on the outskirts out the belly. Morphs in the BEL complex should have clear bellies too. The snake you posted has an average looking belly and looks normal from what I can see: normals can have clean bellies to checkered ones too. If you want to see if your snake is a morph I'd post a full body shot.