Hammerhead2 - Yours seem to be the undescribed sp. Jenaro Herrera.
Netengo - Yours are somewhat of a mystery. They have a partial facial line which would rule out diadema (which only has a single spot) and the blueish color also rules out diadema (unless you have an antinic light which would be casting the blue).
The midlateral spot extend into the dorsal fin like sp. Jenaro Herrera, but the face is blue instead of green and the pelvic fins don't look solid orange like the sp. Jenaro Herrera in the previous posters.
But that line behind the cheek isn't a full stripe like it should be for metae.
I hate acaras sometimes.