Why has my Fish Stop eating?

[kingfish]

Has anyone had experience with a fish that stops eating all of the sudden? I recently had a blenny scooter perish that ate ready when I first purchased him (aka Bennie Seigal RIP) . He would eat virtually anything Mysis shrimp, amipods, copods and pellet food. Over a period of time it seemed as if he could not swollow food. He would take the food in an spit it out as if he had a blockage of some sort in his digestive tract.

 

At the end my fish straved to death. Does anyone have a clue what could possibly cause this to have occured and what can I do to prevent or stop something like this from happening again.

 

if its medication I need let me know so I can purchase some. I quaritine my fish before i put them in my main tank.

[Black Mammoth]

It sounds like it was sick. Did it have any visible signs of being sick? i.e. spots/specks, breathing fast, etc. Maybe it had an internal parasite. I know that there are some meds you can use to treat internal parasites.