Bubble Eye Goldfish

Carassius auratus

Animalia›Chordata›Actinopterygii›Cypriniformes›Cyprinidae

Variety of Common Goldfish · Bubble Eye

📍 China (captive-developed)

Fancy goldfish with enormous fluid-filled sacs beneath each eye. Lacks a dorsal fin. Extremely delicate — sacs can puncture on sharp decor. Requires a bare-bottomed tank, sponge filtration, and calm companions.

Size5"

Min Tank20g

School2+

peaceful

Zonemid

Care Guide

Diet

Bubble Eye Goldfish are omnivores that require a varied diet of high-quality goldfish pellets, vegetable matter, and occasional protein sources. Feed sinking pellets daily, supplemented 2-3 times weekly with blanched peas, spinach, or algae wafers to support digestive health. Avoid live foods with sharp edges that could puncture the delicate eye sacs; frozen foods are safer alternatives.

Behavior

Bubble Eye Goldfish are slow, deliberate swimmers that spend most time in mid-water zones, often appearing to hover. They are peaceful and non-aggressive but may accidentally damage their own eye sacs on sharp objects or when startled. These fish are curious and interactive with their owners, though their poor vision makes them less aware of their surroundings than other goldfish varieties.

Breeding

Breeding Bubble Eye Goldfish in captivity is extremely difficult and rarely successful in home aquariums. They require very large tanks (75+ gallons), specific temperature triggers, and careful conditioning. Most specimens available in the hobby are commercially bred in Asia; home breeding attempts typically result in few viable fry and high mortality rates.

Tank Mates

Fancy Goldfish

Same species group with similar care needs, temperament, and water requirements

excellent

Gold Mystery Snail

Peaceful scavenger that won't damage eye sacs and helps with tank cleanliness

good

Ramshorn Snail

Small, non-aggressive snail that poses no threat to delicate eye sacs

good

Nerite Snail

Hardy algae eater that coexists peacefully without competing for food

good

Common Diseases

Eye Sac Rupture

Symptoms

Deflated or punctured fluid sacs, loss of symmetry, bleeding or cloudiness in the sac

Treatment

Isolate immediately in a bare-bottomed hospital tank with pristine water quality. Provide antibiotics if secondary infection occurs. Prevention is critical—maintain bare-bottom tanks and remove all sharp decor.

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots on body and fins, flashing against surfaces, rapid breathing

Treatment

Raise water temperature gradually to 28-30°C over 48 hours and maintain for 10 days. Use ich-specific medication following label directions. Perform 25% water changes every 2-3 days.

Fin Rot

Symptoms

Frayed or disintegrating fins, white or gray edges, lethargy

Treatment

Perform 50% water change immediately and improve water quality. Use broad-spectrum antibacterial treatment. Ensure sponge filtration is functioning properly to maintain low ammonia.

Constipation

Symptoms

Loss of appetite, bloating, difficulty swimming, feces trailing from anus

Treatment

Feed blanched peas for 2-3 days as a natural laxative. Reduce feeding frequency temporarily. Ensure adequate fiber in diet and maintain water temperature at 20-22°C to support digestion.