My tetra fish is laying at the bottom of the tank and has or

  He has been sitting at the bottom of the tank just breathing for the last day or so. I thought he was dead, but i looked closely and he was actually breathing. If i touch him he will swim around a little sideways, and im afraid he will die of starvation. also his fins have turned from clear to orange. nothing has changed in the tank so its not any form of shock i can think of.
the fish is definitely sick.if you could, i would see a fissh doctor, and there ARE such things.it may be that one of the other fish oin the tank is giveing him some kind of reaction.i think its over for the little guy.sorry: (