Why are my goldfish acting strange?

Can anyone tell me what's wrong with them? I bought a new 30 gallons or 110 liters fish tank and cycled it for two weeks. I bought two new goldfishes a week ago. The first three days they were acting pretty normal. But from the fourth day onwards, they...

Hiya peeps. I am a 13 year old Goldfish owner. My shubunkin,(a little bit like a mini koi-fish), is acting strange when the light is on. It just floats midway between the top and bottom of the tank. It comes for food, but otherwise, just seeming absent...

I've never seen my pearlscale do this before. He is lying on his back against the side of the tank, still breathing, and if I tap the tank, he'll move, but then he'll go back to the side of the tank. Do you think something's wrong with him, or is this...

I bought 2 little gold fish, one of them is acting normal, but the other one is opening his mouth open wide really quick and shutting it, he swims sideways near the ground as if a ...show more

I just brought him home 2 days ago. He's one of those little 25 cent goldfish. He won't eat, he won't swim. He goes to the bottom and stays there. Yesterday, he would ...show more

I have one baby black moor that's about half an inch long . I have another that's about two inches long. The biggest one swims crazily every once in awhile. I don't know how to describe it . It just goes berserk ! when it's not swimming around the tank...

My goldfish has been acting really strange since this morning. He was doing just fine yesterday, but today he's been acting scared-like. Last night there was a really bad thunderstorm that was really loud. I was wondering if he got scared with it and...

Got 2 goldfish one acting funny,can you over feed a goldfish?

It is a small oranda goldfish I just got it today. I cycled the water and put up lots of decorations. My fish goes behind and always hides behind a decoration and kind of lean to its side without moving and I don't know what is wrong with it and I don...