WOW! That is definitely one of a kind. It appears to be leucistic or some other genetic mutation. Normally I do not recommend people take wild specimens for pets but due to his coloring, this guy has a much lower chance of survival. A rarety like this should be in a zoo or something. :-)

I do not personally keep bullfrogs but I do know they need a LOT of tank space. You'll probably end up needing a 100 gallon tank. Heathanne is a good person to ask. I will say that frogs with genetic mutations sometimes have health problems. But on the other hand, bullfrogs are notoriously hardy creatures. Please keep us posted!