How do you tell these guys apart.theirs a recent wave of them I'n a few shops here i bought the reddest one i could find. Buddie at the shop claims that the females turn amazing red when the are larger and the male not so nice.i did some research only to find out that certain pikes actually go very red I'n coloration when larger.these fish are labeled I'n the shops here as atabapo " fire pike" .any thing i should know ?? How can i tell the apart at that size both type and sex?