there is a round bump about 3cm tall at the very end on the top surface of the body. i noticed it yesterday and today it is much bigger. is this normal?

No. could you send in a pic?
greg

Doesn't sound normal... COuld you get a pic? it woiul help alot.

sounds liek abump from jetting backwards... can u see the cuttlebone?

OOOff...that would suck. How big is your tank?

i cant see the bone. its wierd it is always darker than his apperant color. my tank is only 60gal :-( i am getting a 180 for him but it may be a couple of months. it looks like a blister that could pop? i will try to load the pic

I received the one you sent to me via email...and I hate to say, but it does look like the cuttlebone...I hope I am wrong!
:cry: greg

It is most likely a gas bubble or tissue build-up that forms form them constantly running into the tank. It is not life threatening but can lead to bigger problems. If it keeps running into the side of the tank it will most likely crack its cuttlebone and possible die.

Could be an infection from butt burn thats causing the bump, I don't think its a cuttlebone, too round.

Does it affect his locomotion skills at all? It sounds weird.... Getting bigger u say? Hope the poor little guys pulls through.

actually it is getting smaller :-) im keeping the water cooler, it seems to be calming him down. is there any kind of antibiotics or medicine i could put into the water that might help?