NL2 - 6max game. UTG and HJ fold. We're in the CO. BB and SB are regs. However BTN is a fish which we don't know yet what type of fish he is. In this spot if BTN, SB, BB were regs, we'd open around 25% of hands or maybe a bit more. In this case with the fish, what should we open though? Should we open wider? I know that if fish was in the blinds then that means we should open wider(I read this in Grinder's manual). What about this spot though?