while searching on the internet, i found a picture of something that looks like the white dot on my comet goldfish: 
it's not my picture. i'm just saying that those 2 dots near the top of its dorsal fin. at least i think it's the dorsal fin. It's the fin on the very top. Those two specks look like the same one that my comet goldfish has on its tailfin. it's near the edge as well. But there's this redish streak at the tip of the tail. the redish streak was NOT there two days ago. so what is this dot? and what's the red streak?
if it turns out that it's a disease, than i have to go to petco/petsmart to buy stuff tomorrow. i've had my goldfish for about 1/2 a year. the wierd dot only appeared the day before yesterday though.

it's not my picture. i'm just saying that those 2 dots near the top of its dorsal fin. at least i think it's the dorsal fin. It's the fin on the very top. Those two specks look like the same one that my comet goldfish has on its tailfin. it's near the edge as well. But there's this redish streak at the tip of the tail. the redish streak was NOT there two days ago. so what is this dot? and what's the red streak?
if it turns out that it's a disease, than i have to go to petco/petsmart to buy stuff tomorrow. i've had my goldfish for about 1/2 a year. the wierd dot only appeared the day before yesterday though.