Help! sharp picture inside

I dont know. Maybe someone else could help. If you go to the stickies though, there is some disease descriptions with pics and other info. Its worth checking out.

I kinda recall some other people reporting a problem like this before, and I think they were told not to feed the fish for a few days or something. But I am not sure.

i cant remember the name of it, prolapse i think, but try some shelled peas to get its digestive system going. cut down but preferably stop the meat, feeders and beefheart these arent good for fish anyway. beefheart should be used as a very occasional treat if you insist on using it but certainly not as part of the staple diet.
stick to a good pellet staple and frozen foods like bloodworm/blackworm and live crickets/worms. im introducing spirinula based pellets for my midevil to keep his digestive system in check even though his staple is hikari now. maybe consider something similar once or twice a week to keep the jags digestive system healthy.
if that doesnt work then im sure lupin or someone with more illness knowledge will pitch in.

it looks like a hemmroid (sp) it usually happens from over feeding.... feeding goldfish will worsen it (happen to my friends flowerhorn) do a H2O change add some salt and try to get it on pellets or less night crawlers

yep thats a hemorrhoid. increase your temp add salt and keep water clean... it will go away just keep the water super clean

by any chance is there a pair in there? I wouldn't say it's the ovipositer but something is inflamed. Possibly too much fishy sex.