Wakin

The Wakin is a selectively bred form of goldfish with an elongated, robust body resembling a carp in shape. The main distinguishing feature of the breed is a forked caudal fin, although individuals with a single tail are also found. These fish are highly active and hardy. In aquarium conditions, their average size is about 20 cm, but in spacious ponds, they can grow up to 30 cm or more. The coloration is usually variegated, consisting of large patches of red, orange, and white; specimens with bright, contrasting patterns are considered the most valuable.

The Wakin is an artificially bred variety and therefore does not occur in the wild. Its ancestor is considered to be the goldfish (Carassius auratus), originating from the waters of East Asia. In Japan and China, this breed is traditionally cultivated for both ornamental ponds and aquariums. The fish adapt well to moderate temperatures and can tolerate seasonal fluctuations characteristic of open waters, provided the water does not freeze to critical levels.

These are active and agile fish that exhibit social behavior and feel comfortable in a group of their kind. Unlike many short-bodied goldfish breeds, Wakins are excellent swimmers, capable of successfully competing for food. They are peaceful towards other species, but due to their activity and size, they can cause inconvenience for slow-moving or smaller fish. Intraspecific conflicts are practically absent, except during spawning periods.

For keeping Wakins, a spacious aquarium of at least 150 liters per individual is required, as the fish grow quickly and produce a large amount of organic waste. Powerful filtration and regular water changes are necessary. Water parameters: temperature 18–22 °C, pH in the range of 6.0–8.0, hardness 5–19 dGH. The substrate should either be coarse enough so that the fish cannot swallow it, or absent altogether. Lighting should be moderate, and the aquarium decor should be free of sharp elements that could damage fins.

Wakins are omnivorous and undemanding in their diet. The diet should include both dry specialized foods (flakes or pellets), as well as vegetable supplements and frozen foods. Feeding is recommended 2–3 times a day in small portions that the fish can eat within a couple of minutes. It is important to avoid overfeeding to prevent water pollution and digestive problems.

Spawning is paired or communal, usually stimulated by a spring increase in water temperature. For breeding, a separate spawning tank of at least 100 liters with a separator grid at the bottom is required, as parents may eat the eggs. The female lays up to 2000 eggs, which attach to the substrate or aquatic plants. The incubation period lasts up to 3 days. Fry are fed with infusoria or specialized starter foods for goldfish fry.

The fish are characterized by robust health, but are sensitive to water quality. The main problems arise from the accumulation of nitrates and ammonia, which can lead to bacterial infections, fin rot, or parasitic diseases. Prevention involves maintaining cleanliness in the aquarium, proper feeding, and avoiding sudden fluctuations in water parameters. With proper care, Wakins can live up to 20 years.

When purchasing, choose active, agile individuals with clean fins and scales, free of visible damage, ulcers, or white film. It is important to pay attention to the fish's breathing — it should be calm, without signs of gill parasites. Avoid individuals with deformed spines or signs of emaciation. It is recommended to purchase fish from reputable breeders, as a healthy Wakin should show curiosity and actively respond to food.