There are no RES snapper turtles. RES can be agressive, but it does depend on the turtle. Snappers, I do believe have an innately mean disposition, although if reared from a hatchling in captivity, this can be lessened to some extent.
I've currently got two hatchling common snappers, the size of 50-cent pieces. The other day I was feeding them and got my finger too close to one of their mouths. The turtle latched on to the tip as I lifted my hand and stayed on until my hand was just about out of the tank. He was too small to cause pain, but I could just feel how powerful s/he is going to be one day, if s/he makes it to adulthood.
