Lionhead goldfish
Carassius auratus
intermediate careOverview
The lionhead goldfish (Carassius auratus) is a dorsal-less fancy crowned with a bushy, raspberry-like “wen” that resembles a lion’s mane. Closely related to the ranchu, it has a flatter back and reaches 15–20 cm, living 10–15 years. With no dorsal fin it is a slow, somewhat wobbly swimmer, and its headgrowth can grow over its eyes, so the lionhead is a gentle, delicate fish that needs clean water and calm companions to thrive.
Tank & water
Give one lionhead 75 litres (20 gallons), plus about 40 litres per extra fish. Priorities:
- No heater, stable warmth: lionheads are cold-water fish that prefer a steady 18–23 °C as a sensitive fancy.
- Clean water for the wen: over-filter with a good external filter and keep on top of changes so the headgrowth doesn’t become infected.
- Gentle flow, smooth décor: as poor swimmers with obscured sight, they need soft current and rounded ornaments.
Feeding
Lionheads are omnivores, and careful feeding keeps them upright and healthy. Use a quality sinking goldfish food rather than dry floating pellets, plus blanched peas and soft vegetables to prevent constipation and floating. Feed small amounts once or twice a day, soaking pellets first, and remove leftovers. Keep water pristine with regular maintenance and water testing to protect the wen.
Tankmates
Keep lionheads only with slow, gentle fancy goldfish — ranchu, orandas, black moors, celestials and bubble-eyes. Faster fancies like ryukins, and certainly single-tails like comets and shubunkins, will out-compete these slow feeders. They are not tropical community fish. A group of equally slow fancies in a spacious tank is ideal — plan numbers with how many fish in an aquarium.
The wen takes a year or more to develop and is a good gauge of husbandry: it grows full and plush only on a fish kept in warm, clean, spacious water, and it can thin or become patchy if conditions slip. Watch, too, that the headgrowth never covers the nostrils or eyes so much that the fish struggles to feed or navigate. Given that attention, the lionhead is a gentle, characterful goldfish that makes an excellent centrepiece for a dedicated fancy tank.
Lionhead goldfish — frequently asked questions
How big do lionhead goldfish get?
Lionheads reach around 15–20 cm as rounded, dorsal-less fancies. They are heavy-waste fish that need a large, well-filtered tank despite their gentle nature — see how big do goldfish get.
Do lionhead goldfish need a heater?
No. Lionheads are cold-water fish, but as a delicate dorsal-less fancy they prefer stable, warmer water around 18–23 °C and dislike cold snaps. In most homes no heater is needed — see do goldfish need a heater.
What is the difference between a lionhead and a ranchu?
Both are dorsal-less fancies with a wen, but the lionhead has a flatter back and straighter tail, while the ranchu has a strongly arched back and a downturned, tucked tail. Their care needs are essentially the same.
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