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About The Author
Authors Notes
Your First Pond
Trees & Sunshine
Take The Plunge
Preformed Pools
Installing A Liner
Making A Raised Pool
A Koi Pond
Miniature Ponds
Adding A Waterfall
Colourful Ponds
Choosing A Pump
Solar Powered Pumps
Looking After A Pump
Pond Pipework
Installing A Fountain
Self-Contained Fountains
The Leaky Pond
Planting The Pond
A Wildlife Pond
A Bog Garden
Pond Plants
Plants Round A Pond
Choosing A Lily
Floating Plants
Water Hyacinth
Oxygenating Plants
About Fish
When To Buy Fish
Choosing Fish
Quarantining Fish
Fish Under Stress
Feeding Your Fish
Holidays & Fish
Breeding Coldwater Fish
Changing Colours Of Fish
Pond Fish
A Koi Collection
Ghost Koi
Fancy Goldfish
Coldwater Catfish
Grass Carp
Rearing Trout
Swan Mussels
Visitors To The Pond
Visiting A Koi Auction
Clubs & Societies
Caring For Fish
Testing The Water
Are You Poisoning Your Fish
Ponds & Medicines
Diseases & Parasites
Disappearing Fish
Problems With Herons
Green Ponds
Fish Pond Filters
How A Filter Works
Improving Your Filter
Ultra Violet Sterilizers
Looking After A Filter
The Pond Through The Year
Spring Cleaning
Pond Plants In Spring
Ponds In Summer
Autumn & Winter
Breaking The Ice
10 Problems
Useful Facts & Figures

Allotment Articles1.
Allotment Articles 2.

Changing Colours Of Fish

People often ask why their goldfish has changed colour and there can be several explanations. The most popular colour change is from black to red. Sometimes people buy a fish because it has nice black marks on its otherwise normal colour of orange. The black disappears and the fish ends up pure orange. This is a normal colour change, as all goldfish, start life black and turn to orange as they grow.

Age and temperature affect the change as can food. Some foods, especially koi foods have a colour enhancer that is based on carotene and brings out the reds and oranges in the fish. Sometimes goldfish turn white and this can be compared to hair turning white as people get older. Some people’s hair turns white quite young and others never do. This is the same with goldfish with most stay orange all their lives.

Black Moors sometimes turn orange like a goldfish. This is because the fish is a genetic throwback and has not bred true to the Black Moor colouration. Very occasionally a goldfish will develop small black patches as it gets older. This not natural and could well be due to a tiny parasite which will slowly spread if left untreated and may eventually kill the fish. An ordinary parasite treatment should cure the problem.

Other fish will change colour as a normal development when the fish matures. Baby Shubunkins start life as a very pale fish with no colour and gradually assume their characteristic red blue and black colours. Koi carp also develop better colour markings as they get older. This is why it is always a bit of a gamble buying small Koi as you never know what colour they will finish up when they have matured. Indeed Koi enthusiasts are always searching for the perfectly marked Koi for their collection. They sometimes go to extreme lengths to achieve perfection, even to the point of surgically removing scales to remove small blemishes in the markings.