Pearlscale Goldfish
The Pearlscale is a nearly spherical goldfish armoured in raised, calcium-domed scales like sewn-on pearls.
Last reviewed: October 2026
Species guide: Goldfish · Goldfish and koi, breed by breed
AI illustration Overview
The Pearlscale is a nearly spherical goldfish armoured in raised, calcium-domed scales like sewn-on pearls. Endearing and absurd in equal measure, it waddles through calm water on fins that seem borrowed from a smaller fish, and asks for the gentlest of the standard fancy setups.
Natural History
Developed in China in the early 20th century; the crowned form (Hamanishiki, with a bubble-dome hat) followed from Japan in the 1970s.
Appearance
Ping-pong-round body 10-15 cm covered in domed pearl scales; oranges, calicos, red-whites. Lost scales regrow flat - handle with extra care.
Tank Size & Setup
75+ liters, warm-end-of-goldfish (20-23°C - they're cold-sensitive for goldfish), minimal current, smooth decor, and only equally gentle round tankmates.
Water Parameters
20-23°C stable, immaculate; the round body is even less tolerant of chills and poor water than other fancies.
Diet
Small sinking portions of gel/pellets plus regular peas and greens - THE swim-bladder-sensitive breed; overfeeding a Pearlscale is how buoyancy problems are made.
Health & Lifespan
Average lifespan is 8-12 years. 8-12 years carefully kept; buoyancy issues and chill sensitivity are the breed's known weak points, both largely diet-and-temperature managed.
Pros & Cons
Pros
- Utterly charming golf-ball look
- Pearl scales unique among fish
- Sweet slow-water personality
- Compact size for a fancy
Cons
- The most buoyancy-prone breed
- Cold-sensitive for a goldfish
- Scales scar flat if knocked
- Needs calm, competition-free tanks
Everyday gear for aquariums
Links go to Amazon or a partner brand's own store and may earn us a commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. An Amazon link leads to a type of gear and you choose the exact product; a card that names a store leads to that partner's own shop.
Pearlscale Goldfish - frequently asked questions
Do the pearl scales grow back?
If lost they regrow as ordinary flat scales - the pearls don't return, so gentle handling and smooth decor protect the look for life.
Why is mine floating after meals?
The spherical gut: feed smaller sinking meals, add peas weekly, and skip a day now and then - Pearlscale buoyancy is a diet dial.
What is a Hamanishiki?
A crowned Pearlscale - the same golf-ball body plus a bubble-dome wen on the head. Same care, extra hat.
Test yourself: guess the fish
Three clues from our quiz bank, each about another of our fish. Can you name them?
Clue 1.Easy to breed and colorful, the males of this small species sport flashy fan-shaped tails to court drab females.
It's the Guppy - read the full profile →
Clue 2.Diamond-shaped with long flowing dorsal and anal fins, this popular tank fish needs a tall aquarium to accommodate its towering body.
It's the Angelfish - read the full profile →
Clue 3.Fancy varieties of this fish include bubble-eye and telescope-eye types bred for unusual looks.
It's the Goldfish - read the full profile →