Garden Ponds – Fish Diseases

Ichthyophthiriosis (Ich):

• Commonly known as “white spot disease,” ich is caused by a parasitic protozoan.
• Infected fish develop white spots on their skin and fins, along with scratching and flashing behavior.

Ulcers and Sores:

• Open wounds or ulcers can develop on fish due to physical injuries or bacterial infections.
• These wounds can become infected, leading to deeper health issues if not treated promptly.

Fin Rot:

• Bacterial infection that causes degradation of the fins and tails of fish.
• Fins appear frayed and disintegrated, and the infection can spread to the body if left untreated.

Aeromonas and Pseudomonas Infections:

• Bacterial infections that can cause symptoms ranging from ulcers to fin rot and lethargy.
• Often exacerbated by poor water quality and stress.

Costia (Ichthyobodo necator):

• A parasitic flagellate that can lead to skin and gill irritation, resulting in fish flashing and respiratory distress.

Parasitic Worms:

• Worms such as flukes can infest fish, leading to irritation, inflammation, and possible secondary infections.

Lice and Anchor Worms:

• External parasites that attach to fish, causing irritation, inflammation, and sometimes secondary infections.

Carp Pox:

• A viral disease that manifests as raised, wart-like growths on fish.
• While not usually life-threatening, it can affect fish appearance and quality.

Viral Hemorrhagic Septicemia (VHS):

• A viral disease that can cause hemorrhaging, organ damage, and death in fish.
• It’s particularly concerning for native fish populations and can lead to significant mortality.

Water Quality-Related Issues:

• Poor water quality, such as high ammonia or nitrite levels, can stress fish and make them more susceptible to diseases.
• Algae blooms and oxygen depletion can also affect fish health.