[AwesomeBean]

Here I have all the common diseases for Goldfish. Tropical Fish can get them too, But I'm not sure which ones, So I'll just say Goldfish Diseases.

Surprisingly enough, Goldfish have a LOT of diseases. I am going to list them and what the signs are if a Goldfish has a disease.

Constipation: Fish has difficulty passing feces, Feces follow the fish.
Anchor Worm: Fish scrapes against objects, Little tiny greenish-whitish worms are attached to a cut/scrape on fish, Ulcers
Dropsy: Swelling of the fishes abdomen, Sometimes scales are sticking out
Black Smudge: Black bloches on fish, Black bloches spread FAST!
Fin Rot: Pieces of the fish's skin fall off
Fish Lice: Fish rubbes against objects, 1/8 - 1/4 inch parasites are attached to the fish's body.
Gill Flukes: Gills on fish move fast, fish gasps at surface for air, gills coated in mucus, fish scraps himself against objects, Parts of gills are eaten away
Whitespot Disease: White spots on fish's body, Gills move fast
Fungus: Fuzzy grey, White or dirty white growth on fish's body
Mouth Fungus: White, Grey or whitish-greyish patches or fluffy stuff around the fish's mouth, White or grey areas on skin or eyes
Pop-Eye: Eyes protude unusually away from head
Septicemia: Red areas or streaks on fish's body,fins, or bases of fins, Protruding blood vessels at fin bases, lack of appetite, sluggish or very sluggish behavior
Skin Flukes: fisn scrapes against objects, fish becomes mucus covered and colors fade, frayed fins, sluggishness, dulled coloration, damaged gills, death
Swim Bladder Trouble: Fish has troubles swimming or staying upright, Lays on side
Tail Rot: Ragged fins, White edged fins
Tuberculosis: Weight loss, ulcerous wounds, Protruding eyes, Faded colors, Fins clamped shut
Velvet Disease: Fine gold dust speckled on fish's body, Gills move fast
Wasting: Fish's head appears larger then normal, Fish appears to be losing weight

Hope I helped!