Oh, and thanks for the other comments - and to Craig for explaining the difference in species, since I'm still a bit clueless about these guys.
Btw Craig, everyone on the Morelia forum thinks he's fat... I thought he was fine, but apparently he needs to join Dash on her diet. He ate a live adult mouse last week, and I'll probably wait 10-14 days between meals for a while.
Wait 5 months - you'll think he's skinny. He'll drop down this fall.
He looks fatter in the pics than he does in person - then again, if people think he's grossly overweight - who an I to argue?
Feed him every two weeks and see where his weight settles down.