Red and White Comet Goldfish (Sarasa Comet)

The red and white comet goldfish, also known as the Sarasa Comet, is a hardy, active, single-tailed cold-water fish. Prized for its striking, deep red and brilliant white color patterns, it is a highly popular choice for both large aquariums and outdoor garden ponds.

Physical Characteristics

Appearance: Bright, saturated red patches over a solid white body. Some display unique patterns like a red head spot, resembling a Tancho Koi.

Fin anatomy: Features a long, elegant, and deeply forked single tail fin that spreads like a pair of scissors.

Size: Easily grows to about 20 cm (8 inches), and can exceed 30 cm (12 inches) under ideal conditions.

Lifespan: Typically lives between 5 to 14 years, but can survive up to 20 years with proper care.

Habitat & Tank Requirements

Because they are fast, athletic swimmers that produce a high amount of waste, they require a lot of space and strong filtration.

Tank Size: A minimum of 100 to 115 liters (approx. 30 gallons) for the first fish, adding 40 liters (10 gallons) for each additional fish.

Pond Life: They thrive exceptionally well in outdoor ponds and are excellent, budget-friendly alternatives to Koi.

Water Temperature: Cold-water fish preferring 16°C to 24°C (60°F to 75°F). They do not require a heater.

Water Parameters: Keep the pH level between 6.5 and 7.5, and maintain zero ammonia and nitrite levels.

Diet and Feeding

Sarasa Comets are opportunistic omnivores and will eat almost anything offered.

Staple Diet: High-quality goldfish pellets or flakes. Pellets are ideal because they fit easily into their mouths and reduce surface air-gulping.

Treats: Supplement with blanched vegetables (like peas and spinach), live or frozen foods (bloodworms and brine shrimp), and duckweed.

Frequency: Feed small amounts 2 to 3 times daily. Avoid overfeeding, as they will always act hungry.

Compatibility & Tank MatesThey are peaceful, social schooling fish and should ideally be kept in groups.

Good Tank Mates: Other fast, single-tailed goldfish like common goldfish, other comets, and Shubunkins.

Bad Tank Mates: Do not house them with slow-moving "fancy" goldfish (like Orandas or Black Moors), as the speedy comets will outcompete them for food. Avoid aggressive or tropical fish species.