strange discoloration, plz healp 3 picts 56k warning

hmt321

AC Members
Nov 21, 2005
254
0
0
has anyone ever seen anything like this? this fish was fine this morning when i got home an hour ago i 1st noticed that its back end is darker in color very weird. her are some picts,
IMG_0226.jpg


and here
IMG_0222.jpg


ok tank specs

40 gal wide

5 baby sunfish (7/8" and under)
8 sailfin shiners (1.25" and under)
2 madtoms (3/4")

this is a grow out tank they will be moved to a 100 gal in approx 4-5 months

water

ph = 7
ammonia = 0
nitrites = 0
nitrates = 10-15

there are lots of plants, water temp is 71 f
i feed frozen Bloodworms and flake food (1 cube of bw per day) ( im gona move them along to flake in a week)

These are (except for the madtoms) "wild" fish i have kept them before but have never seen anything like this should i be worried, the fish in question is absolutly fine, eating and everything like normal

what is this?????????
 
AquariaCentral.com