Confirmed that these models are not stolen. Excellent models! There are some minor errors, though:
SHELLDER:
- Nothing wrong spotted so far.
Rating: 10/10
CLOYSTER:
- The inner right shell seems aligned with the inner left. It's supposed to be bent inward a bit towards the inner left shell (from Cloyster's POV).
- The shell needs to be a bit more rugged. It is smooth and symmetrical, looking too artificial.
Rating: 8/10
BOTH:
- After all, errors are fixed, you should try to reduce the poly count for both as much as you can while still maintaining the shape.
REFERENCE:
SHELLDER:
CLOYSTER