Veiltail Goldfish

The Veiltail Goldfish is a selective breeding form of goldfish with a shortened, egg-shaped, or spherical body. A distinctive feature is its very long, thin, and practically transparent fins, especially the caudal fin, which can be several times longer than the body. The anal fin is bifurcated. Coloration varies from bright red and golden to white, black, or calico. Sexual dimorphism is weakly expressed during normal times; during the spawning period, males develop small, light tubercles on their gill covers and serrations on their pectoral fins.

The Veiltail Goldfish is an artificially bred selective form of goldfish, so this species is not found in the wild. Its progenitor is considered to be the Prussian carp. In aquarium conditions, these fish are adapted to a wide range of water parameters, but for their well-being, a clean, well-aerated environment is required.

These are peaceful and slow-moving fish that do not show aggression towards their own kind or other species. Due to their slowness and luxurious fins, it is not recommended to keep them with active or aggressive fish that might nip their tails. Veiltails prefer the company of their own kind or other short-bodied goldfish. They may accidentally swallow very small tank mates.

For keeping, a spacious aquarium is required, preferably 50–80 liters per individual, with powerful filtration and aeration due to the large amount of organic waste. Coarse, smooth gravel should be used as substrate so that the fish cannot swallow it. Decorations should not have sharp edges that could damage the fins. Recommended water parameters: temperature 18–22°C (up to 25°C is acceptable), hardness 5–19 dGH, pH 6.0–8.0.

Veiltails are omnivorous and prone to overeating. Their diet should include both animal and plant components. It is recommended to use specialized dry foods for goldfish that do not disintegrate quickly in water. Feeding should be done 2–3 times a day in small portions that the fish can consume in a couple of minutes. It is beneficial to periodically offer blanched vegetable supplements.

Spawning is paired or in groups, possible in an aquarium of 40–50 liters with a mesh at the bottom to protect the eggs. A stimulus is an increase in water temperature by several degrees and frequent water changes. After spawning, the parent fish are removed. Fry hatch after a few days and begin to swim after 3–5 days. Initial food is infusoria, rotifers, Artemia nauplii, or specialized fry foods.

The fish are sensitive to water quality; the accumulation of ammonia and nitrites quickly leads to a decrease in immunity and diseases. They often suffer from fin infections, fungal lesions, and swim bladder problems due to their specific body structure. Prevention involves regular water changes, maintaining substrate cleanliness, and preventing overfeeding.

When purchasing, choose active individuals with clean, undamaged fins and scales without plaque, ulcers, or bruises. It is important to pay attention to the absence of signs of inflammation or unnatural abdominal distension. Avoid fish that appear sluggish, constantly lie on the bottom, or have 'frayed' fin edges, as this may be a sign of bacterial infection or poor keeping conditions.