identified

and

named

a

number


of


specific


categories.


The


most


popular


category


is


Gosanke

,


which

is


made
up
of


the

Kohaku


(Nishikigoi)
,

Taisho


Sanshoku
,

and

Showa

Sanshoku

varieties.
New

Koi


varieties


are


still


being


actively


developed.


Ghost


Koi

were

developed

in


the


1980s,


and

have
become
very


popular


in


the


United


Kingdom.


There

are


a

hybrid


of


wild


carp


and

Ogon


Koi,


and

are
distinguished

by

their


metallic


scales.


Butterfly

Koi
,

also


known


as

Longfin


Koi,


or


Dragon


Carp

were

also
developed
in


the


1980s,


and

are


notable


for


their


long


and

flowing

fins.


They


are


hybrids


of


Koi


with


Asian
carp
.

Butterfly

Koi

and

Ghost


Koi

are


considered


by

some


to


be

not


true


Nishikigoi.

Grass

carp

and

Mirror
carp

also


played


a

small


part


in


what


is


the


modern


day

Koi.
Varieties
of


Koi