Goldfish camallanus worms also known in the hobby as “red worms”, are one of the…

Despite the name, goldfish anchor worm isn’t actually a worm — it’s a parasite, a…

Goldfish Gill flukes have a reputation among experienced goldfish keepers as one of the hardest…

Fluffy, white or grey cotton-like growths on your goldfish’s body, fins, or mouth are almost…

White or grey cotton-like fuzz around your goldfish’s lips, sometimes with red, eroded tissue underneath,…

A fine, gold or rust-colored dusting across your fish skin — almost like it’s been…

One or both of your goldfish’s eyes bulging noticeably out of its socket is goldfish…

A goldfish with a swollen belly and scales sticking straight out, giving it the look…