Assorted Ranchu Goldfish

Assorted Ranchu Goldfish - Curved Dorsal-Less Back With a Wen, Mixed Colours

The Assorted Ranchu Goldfish is known for its smooth, curved back with no dorsal fin at all, paired with a wen head growth similar to the Oranda's, giving it a compact, egg-like silhouette that's instantly distinct from other fancy varieties.

Without a dorsal fin to aid stability, the Ranchu swims in a slow, gentle arc that suits its calm temperament perfectly, and its wen continues to develop and thicken as it matures. This mixed colour run means every fish carries its own individual head growth and colour combination.

At N8 Aquatics, our fish are carefully raised and conditioned to ensure healthy stock suited to home aquariums.

Species Snapshot

• Adult Size: 15–20 cm
• Tank Size: 150 L minimum
• Temperament: Peaceful, slow swimmer — best kept with other similarly slow fancy goldfish
• Temperature: 18–24°C
• pH: 7.0–8.0
• Difficulty: Moderate (the wen/head growth can trap debris, so water quality needs close attention)

Ideal Habitat and Care

A 150 L or larger tank with a soft, flat substrate and gentle flow suits the Ranchu's dorsal-less, slow-swimming build well.

• Temperature: 18–24°C
• pH: 7.0–8.0
• Water Flow: Gentle — this slow, rounder-bodied swimmer prefers calm water
• Maintenance: Strong filtration with frequent partial water changes, as the wen growth can trap debris and affect water quality

Diet

This omnivore does best on smaller, more frequent feeds suited to its curved, compact body.

• Goldfish flake or pellet sized for a smaller mouth
• Blanched vegetables such as peas or zucchini
• Occasional frozen bloodworm or brine shrimp
• Smaller, more frequent feeds to help avoid swim bladder issues

Compatibility

As one of the slowest-swimming fancy goldfish varieties, wen-headed goldfish do best kept exclusively with other similarly slow, rounder-bodied fancy goldfish.

Suitable tankmates include:

• Other Oranda or Ranchu goldfish
• Other slow-swimming fancy goldfish varieties
• Peaceful, cold-tolerant snails
• Avoid fast single-tail comets, which will out-compete them for food

Avoid aggressive or fin-nipping species.

Why Buy From N8 Aquatics

• Carefully raised aquarium fish
• Healthy, well-conditioned stock
• Strong genetics and vibrant colouration
• Breeder support if you have questions

Pickup Information

N8 Aquatics currently operates as a local pickup-only breeder in Central Queensland.

Orders are collected by appointment after purchase confirmation.

Please ensure you are able to collect your fish before placing an order.

Important

All livestock sold by N8 Aquatics should be introduced to fully cycled aquariums suitable for the species being kept.

Please ensure your aquarium setup and tankmates are appropriate before purchasing.