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Fungal Infections on Aquarium Fish

White fluffy growth on fish or eggs is fungal — it attacks weakened tissue, not healthy scales on pristine water.

Bulging eyes signal fluid behind the orbit — identify whether one fish had a fight or the whole tank has water problems.

Fish lice look like tiny flat ticks on skin — visible to the naked eye and irritating enough to cause flashing and ulcers.

Anchor worms are visible crustacean parasites — white threads sticking from fish bodies need physical removal plus tank treatment.

Velvet kills faster than ich — a fine gold dust on skin means act tonight, not next weekend.

A fish stuck at the surface or on the substrate often has swim bladder distress — diet and water quality fix many cases.

Dropsy is a symptom not a disease — swollen bodies and raised scales mean internal failure, often with low recovery odds.

Columnaris strikes fast — white mouth patches and saddle lesions need immediate water fixes and targeted antibiotics.

Fin rot starts at the edges — catch water quality problems early before infection reaches the body.