Three kinds of most popular Guppy in Japan – Blue Grass

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German Yellow Tuxedo, Blue Grass and Albino Full Red are three kinds of most popular Guppy in Japan. This article will talk about Blue Grass.

Blue Grass are famous for their large dorsal and caudal fin with unique black speckles. The speckles are dense and well-distributed. That makes the fins look like grass. So, this strain got its famous name “Grass”.

The guppy stands the dorsal fin like a sail and swings its caudal fin rhythmically, just like a sapphire in the ocean, deep and mysterious. The speckles make it special, and the blue make it everlasting.

Blue Grass

Blue Grass
Blue Grass

Blue and red are a couple from ancient times to the present. Blue Grass guppy is no exception. When a pair of Blue Grass mating, they may breed Red Grass guppy. Because the Blue Grass is a hybrid with heterozygous blue and red alleles.

The Blue Grass is created out of the Red Grass by crossing to a guppy with the Asian Blau mutation, mutation, variously called Asian Blau, r2 in Europe or Brao in Japan. (“Brao” is a variation in the spelling of “Blau.”). The Asian Blau allele is autosomal dominant. When the guppy is heterozygous for the Asian Blau allele, the blue iridescent color is produced. When it is homozygous for the Asian Blau allele, a dull, colorless phenotype is produced.

Philip Shaddock

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How to breed Japanese Blue Grass Guppy – Part I: Genetic formulas for Blue Grass Guppy

How to breed Japanese Blue Grass Guppy – Part II: Which formula will we use

How to breed Japanese Blue Grass Guppy – Part III: Key points for picking a male Blue Grass as parent fish

How to breed Japanese Blue Grass Guppy – Part IV: Key points for picking a female Grass Guppy as parent fish

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9 thoughts on “Three kinds of most popular Guppy in Japan – Blue Grass

  1. […] Yellow Tuxedo, Blue Grass and Albino Full Red are three kinds of most popular Guppy in Japan. This article will talk about […]

  2. […] Yellow Tuxedo, Blue Grass and Albino Full Red are three kinds of most popular Guppy in Japan. This article will talk about […]

  3. Great internet site! It looks really good! Keep up the great job!

    1. Thank you very much!

  4. […] Different from black speckles, the BLUE color is controlled by a pair of genes on autosome. The dominant gene is B, and the recessive gene is b. There are three combinations: BB, Bb, bb. The Bb combination gives us Blue Grass, and if the genes are BB, we will get Red Grass, and we called bb as Asian Blau. (What is Asian Blau? Please see this article) […]

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