I am new to the Pike world. i have a pair of lovely Lents about 6-7" long. The are coloring up nicely and spend most of thier time together in a large rock cave. One is obviously dominate and inflates its gills and head when it emerges quite often....The other spends more of ite time in the cave......can males and females be easily distinguished? Pics are tough as they are still very skitish. i got them three days ago after a long long search. One has some healing tail. The only pic I have so far is only an hour out of the mail and the fish are much better colored now. PH is just under 6. I have 300lbs of rock in the tank which provides a lovely maze. Any help would be awesome....My last tank concept was Datnoids.....this tank is pure South American with a young Mata Mata living on top on the rock structure. A show tank for sure!! TY Ken