Lexi_D your article should include or not include these varieties depending on how deep you want your article to be for the audience it is written. I think these opinions on what Flaringshutter considers for himself as a "real" variety or not is debatable and not well considered.Feeding section looks good but I wouldn't plug Hikari only. Good options are Hikari, Omega One, New Life Spectrum, Pro-Gold.
Here's how I would revise those classes. My personal comments are in italics.
Single Tail Pond
Comet - includes Sarasa Comet & Standard Comet
Common (Hibuna/Funa)
Shubunkin - includes London Shubunkin, Bristol Shubunkin and Japanese/American Shubunkin
Tamasaba - a single-tailed ryukin-like variety, good pond fish, vigorous & aggressive feeders.
Double-Tail Pond
Watonai
Wakin
Vigorous Fancies
Oranda
Ryukin
Fantail - An older variety that isn't seen much anymore. Good swimmers, aggressive.
Pompom - These can be of any variety but are usually orandas. Good swimmers.
Delicate Fancies
Bubble Eye
Celestial
Black Moor
Ranchu
Lionhead
Eggfish
Demekin
Veiltail - Fantail with a long, drooping tail. Medium swimmer, needs less water flow.
Special Needs
Tosakin - Such special needs it really requires its own class.
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These other varieties aren't real.
* Meteor goldfish - these are artificially produced goldfish in which the tail fin is amputated. not a true type. i'd leave them off the list.
* Curled-gill goldfish or reversed-gill goldfish - these are generally seen as a defect and usually culled. they can show up in any variety. leave them off the list.
New varieties
* Azuma nishiki - a nacreous-colored oranda - fancy name for a calico oranda.
* Muse - a cross between a tosakin and an azuma nishiki with black eyes and white translucent scales - it's a color morph and not a true type.
* Aurora - a cross between a shubunkin and an azuma nishiki or between a calico jikin and a tosakin - calico mutt. not a true type.
* Willow - a long and willowy telescope-eyed comet or shubunkin - i can't find any information about these and i've never heard of them. not a true type.
* Dragon eye ranchu or squid ranchu - a telescope eyed ranchu variety - these are simply a bubble eye variant. not a true type.
* Singachu or sakura singachu - a ranchu variant - a color morph.
Revived varieties
* Osaka ranchu - a ranchu relative
* Izumo nankin - a ranchu-like variety
These are variants on the ranchu. I wouldn't include them.
Bubble Eye - 2 bubbles but what do you call the Variety with four bubbles
If "dragon eye ranchu" is variant of telescope eye, why doesn't flaring shutter consider celestial eye a variant of telescope eyes?
Demekin is what Japanese call telescope; Black Moor is a black telescope.
Ranchu, Lionhead, Lionchu, Tigerhead...
you should include pearlscales at the very least.
do your research. start here and here
This link lists varieties well; download the PDF
To just gloss over and dismiss so many different REAL varieties and reduce to the most banal, generic categories really misses the point of what makes goldfish so interesting, that each individual is unique,-however...I am not the one writing the article so carry on.
BTW the reason I have read for not feeding flake is because of relative low nutritional value. and you should mention in your article to feed fresh leafy greens and or green peas regularly.