I can't realy help with the species, i'm sorry. But i can tell the scorpion is rather fat. It could be a pregnant female. Or it could be almost ready to molt. I don't think they get that fat after eating , even if it's a big meal.

Also , with big armor like that i would've said like wolfpach. Probably Emperor Scorp. I'm not a scorpion guy so i wouldn't know any other species of scorp that has such a thick black armor. I can try and look around for the tarrantula's I.D. though. If i find out what it is i'll post another reply.

have a nice day

Krawll