Description
Oranda Goldfish (Carassius auratus auratus)
Overview
The Oranda Goldfish (Carassius auratus auratus) is one of the most beloved and recognizable fancy goldfish varieties, distinguished most prominently by the fleshy, raspberry-like hood (known as a “wen”) that develops on top of its head and over its gill covers.
- Appearance: Features a deep, egg-shaped or metallic-scaled body with a short, rounded profile, paired with flowing, divided caudal (tail) and pectoral fins. They come in a wide range of striking color patterns, including solid orange, red-and-white (such as the famous “Red Cap Oranda” with a stark white body and a solid red wen), calico, black, and chocolate.
- Size: Grows to a substantial size, typically reaching 15 to 25 cm (6 to 10 inches) in length, not including their long fins and robust bodies.
- Lifespan: With proper care, they are long-lived companions, often surviving 10 to 15 years or more.
Care Requirements
- Aquarium Size: Because of their deep, bulky bodies, heavy waste production, and need for swimming space, a minimum aquarium size of 150 to 200 liters (approx. 40 to 50 gallons) is recommended for a single Oranda, with an extra 75 to 100 liters added for each additional fish.
- Water Parameters:
- Temperature: 18°C to 24°C (65°F to 75°F). They prefer cool-water conditions and cannot tolerate sustained tropical temperatures.
- pH: 6.5 to 8.0 (thrives best in neutral to slightly alkaline water)
- General Hardness (GH): 10 to 20°H
- Filtration & Flow: Heavy-duty filtration is essential due to their high waste output. However, water flow should be kept moderate to gentle, as their heavy bodies and large fins make them poor swimmers that can struggle against strong currents.
Maintenance
- Aquascaping: Choose tank decor carefully. Avoid sharp rocks, rough driftwood, or artificial decorations with jagged edges, as Orandas can easily scratch their delicate fins or snag their sensitive head wens. Use smooth river stones and a bare-bottom setup or fine, smooth sand substrate. If using live plants, stick to robust, tough-leaved species like Anubias or Java Fern, as soft-leaved plants will be eagerly uprooted and eaten.
- Water Quality & Changes: Perform routine partial water changes (25% to 30% weekly) to control nitrate levels and prevent water quality degradation.
Diet
- Nature: Omnivorous, enthusiastic bottom and mid-water feeders with a constant appetite.
- Staple Diet: High-quality sinking goldfish pellets or gel foods. Sinking foods are strongly recommended over floating flakes or pellets to prevent Orandas from gulping surface air, which frequently leads to buoyancy and swim bladder control issues.
- Vegetable Matter: They require a fiber-rich diet to support healthy digestion. Supplement their dry foods regularly with blanched vegetables (such as shelled peas, zucchini, spinach, or cucumber) and occasional treats of daphnia or brine shrimp.
Behaviour and Compatibility
- Temperament: Gentle, peaceful, slow-moving, and inquisitive. They spend much of their time leisurely sifting through the substrate in search of food.
- Social Needs: They are social fish that thrive in the company of their own kind. Keep them in pairs or small groups in an appropriately sized tank.
- Tank Mates: Ideal for tanks with other slow-moving, fancy goldfish varieties (such as Fantails, Ryukins, or Lionheads). Avoid housing them with fast, streamlined single-tailed goldfish (like Comets or Shubunkins) because the speedy fish will aggressively outcompete the Orandas for food. Never keep them with tropical fish or nippy species.
Breeding Behaviour
- Spawning Setup: Spawning typically requires a separate, well-filtered breeding tank with cool-water triggers, bare glass or fine-leaved spawning mops, and gentle aeration.
- The Process: Males develop small white tubercles (breeding stars) on their gill covers and pectoral fins. They will enthusiastically chase and nudge females around the tank, prompting the female to release thousands of sticky, clear eggs over the vegetation or substrate, which the male immediately fertilizes.
- Raising Fry: Adult Orandas will readily eat their own eggs. If breeding is successful, the egg-laden mops or parents should be separated immediately. The tiny fry hatch in 4 to 7 days, hanging vertically before becoming free-swimming, at which point they require microscopic infusoria or liquid fry food followed by newly hatched brine shrimp.
Picture for illustrative purposes only. Either come in store to view available stock or request pictures to be sent to you.
Please Note: Due to variations within species resulting from age, region, sex, etc., the actual livestock may not look identical to the image. Approximate size range may also vary between individual specimens.
