The Goldfish: Single-Tailed Carassius auratus: Common, Comet, and Shubunkin

By Jérémy Rogier

The goldfish is one of the world's best-known aquarium fish - and one of the most misunderstood.

How large can a goldfish really grow? How long can it live? Does it belong in a bowl? What tank size, filtration, temperature, diet, and environment does it actually need?

In The Goldfish, J r my Rogier takes a science-based look at the single-tailed forms of Carassius auratus: the common goldfish, comet, and shubunkin.

Drawing on scientific studies, specialist sources, and long-term aquarium practice, this book explores the real biology and needs of an animal too often treated as simple or disposable.

Inside, you will discover:

the history and domestication of the goldfishgenetics, coloration, and scale typesanatomy, senses, behavior, and cognitionadult size, growth, and longevityaquarium size, pond keeping, filtration, and oxygenationwater chemistry and the nitrogen cyclefeeding and nutritionhealth, warning signs, and common husbandry mistakesbreeding and fry developmentthe environmental consequences of releasing goldfish into the wildthe truth behind the most persistent goldfish myths

A properly kept single-tailed goldfish can reach 25-30 cm and live for around twenty years, with verified records exceeding forty years. It is not a small fish, not a tropical fish, and certainly not an animal with a three-second memory.

An accessible, rigorous guide for aquarists who want to understand the goldfish as an animal - not just keep it as an ornament.

• Format: Paperback
• Language: English
• ISBN: B0HJYT3X54
• ISBN13: 9798174506794
• Release Date: September 2026
• Publisher: Independently published
• Length: 112 Pages
• Weight: 0.33 lbs.
• Dimensions: 9.0" x 0.3" x 6.0"