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

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As we discussed on Part II, usually we pick female grass guppy as parent fish, whether it is Blue Grass or Red Grass. We will talk about four key points.

Female and male grass guppies

1. Fish age

Usually, females mature in 3 and a half months. And they will hatch the first-round baby fishes in 4 and a half months. There will be about 40 baby fishes born in first-round, and we will get about 100 babies in second-round.

2. Size

The strong female with thick and short caudal peduncle will pass this excellent gene to offspring.

3. Dorsal fin

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

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In general, the selection standards of male Blue Grass include four main aspects: body shape, fins shape, pattern, and color.

About fish age

Usually, we pick 2 to 6-month-old male fishes as parent fishes. 2-month-old fishes are the best, because they can be parent fishes for 4 months. But it’s a little difficult to confirm whether a two-month-old fish meets the standards because it is still growing.

Next, we talk about the four main aspects.

1. Body shape

This standard is fit for all types of guppies.

a. Size

Usually, the length of whole fish needs to be more than 4cm(1.57inches), of course the bigger the size the better. The length ratio of caudal fin to body is at least 1:1, it’s better that caudal fin is longer than the body. This size standard is fit for all varieties of guppies.

b. Caudal peduncle

General speaking, the best caudal peduncle is thick and short. Such a caudal peduncle can better support dorsal fin and caudal fin, making the swimming stroke more beautiful and elegant.

c. Junction

The junction means the connection between dorsal fin or caudal fin and fish body, the bigger the better.

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

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In article Part I, we introduced 6 formulas for Grass Guppies breeding. Here they are:

_______________Parents_____________________________Child______________________

  1. Blue Grass(Bb) x Blue Grass(Bb) = 50% Blue Grass(Bb) + 25% Red Grass(BB)+25% Asian Blau(bb)
  2. Blue Grass(Bb) x Red Grass(BB) = 50% Blue Grass(Bb) + 50% Red Grass(BB)
  3. Blue Grass(Bb) x Asian Blau(bb) = 50% Blue Grass(Bb) + 50% Asian Blau(bb)
  4. Red Grass(BB) x Asian Blau(bb) = 100% Blue Grass(Bb)
  5. Asian Blau(bb) x Asian Blau(bb) = 100% Asian Blau(bb)
  6. Red Grass(BB) x Red Grass(BB) = 100% Red Grass(BB)

And the formula 4 attracted our attention.

Red Grass(BB) x Asian Blau(bb) = 100% Blue Grass(Bb)

It means all the children of Red Grass and Asian Blau are Blue Grass. But this formula in only for the BLUE color inheritance, it does not affect the genetic expression of black speckles. Exquisite, evenly distributed, and clear black speckles are one of the standards of Blue Grass Guppy appreciation. So, it is necessary to pick the parent fishes that have good-looking black speckles gene. There is a serious problem for Asian Blau. Whether male or female, there is no black speckles on Asian Blau. It is hard to tell whether it has good-looking black speckles gene or not. Of course you can find the answer from its children. But you have to spend months and the result is likely to disappoint you.

This is the reason why the Blue Grass breeders do not use the formula 4 to breed next generation.

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

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Blue Grass are one of most popular guppies in the world. They 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”.  

Blue Grass Guppy

Starting today, we plan to write a new series of articles. In these articles, we will talk about how to breed Blue Grass Guppy, and how to choose the parent fishes, and how to pick the proper offspring according to Mendelian inheritance, what is the genetic formula for Blue Grass Guppy and so on.

This is the first article, let’s talk about the genetic formulas for Blue Grass Guppy.

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Tips and notices for caring and breeding Betta fish Part 1: How to avoid betta dystocia – the importance of oxygen-rich environment

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Hatching baby fishes from your own betta is a great achievement for betta lovers. Breeding in not an easy thing. As the owner, you need to provide an appropriate environment for the brood fish.

We have heard of a case. It’s a sad case. The female and the male mate for two days, there is only few eggs released. The female suddenly died in the third day morning. What a pity!

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One wild fighting fish species that is becoming more and more rare, Betta livida

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Betta livida is one specie of wild betta, the only one habitat in the world is the blackwater swamps near Selangor, west coast of Peninsular Malaysia. It was listed on IUCN Red List in 1994 and assessed as Endangered. Recent years, the large-scale urbanization seriously ruined the ecological environment, this wild betta is becoming more and more rare.

The burgundy body shines green metal gloss, the emerald texture embellishes fins, the metal green marking just like its identity symbol.

Betta livida like clean blackwater, they need acidic and soft water. It is very important that control the water quality when keep Betta livida in aquarium tank. You need to add moderate humic acid and other dirt bed.

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Tips for caring Betta fish

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Betta imbellis,
photo by Kobayashi Michinobu

How to choose a well-growth Betta fish?

In your local tropical fish store, you will find different kinds of colorful male Betta fish. How to pick the healthy and well-growth one? There is a simple trick. Move the Betta fish bottles to be close to each other, the Bettas will do something to try to scare others. It is better that pick the ones who expand all fins.

What kinds of baits to feed Betta fish?

Bettas like live baits and frozen bloodworms. They also can adapt a few flake baits.

What Kind of Water for Betta Fish?

Weak acid (pH between 6.5 to 7) and soft water will meet Bettas’ need. Bettas have strong adaptability to water quality, but don’t change the water quality suddenly. Although Bettas are not very sensitive to deterioration of water quality, it still is important to keep the water in good condition. They don’t like too strong water flow, so, using air pump to drive a sponge filter is a better choice.

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Tips for caring Platy fish

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Feature image photo by Kobayashi Michinobu

Platy fish, binomial name is Xiphophorus maculatus, is a species of freshwater fish in family Poeciliidae of order Cyprinodontiformes. It is also called moon fish in Asia. The same as guppy fish, platy is livebearer. The females lay juvenile fish directly instead of eggs. It’s easy to breed.

Blue Platy Fish, photo by Kobayashi Michinobu

Platies are small, exquisite, mild and colorful. They are the very good choices for the peaceful aquarium. Mix the platies and a few other species into a tank with dense water plants, you can image it, such a wonderful and fascinating water world.

Mickey Platy, photo by Kobayashi Michinobu

Water type

Platies like alkalescent hard water, pH 7 to 7.4, ºdH 9 to 10, water temperature between 71.6? to 78.8. It’s better that add some salt in freshwater, concentration is about 0.5% to 1%. They have good adaptability. You just need to progressively change the water type from weak acid water to neutral soft water to weak alkaline hard water. They will adapt the water gradually.

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Some tips (should know) for Killifish keeping

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Killifish are origin from sub-tropical and tropical area (except for Australia). Known for their vivid color and exquisite pattern, Killifish have more than 1000 species all over the world. Believe that before reading this article, you have been fascinated by their beauty.

But Killifish’s life span is so short, most species can be alive only around one year, some species have longer life span – 2 to 3 years only. Some people think that keeping Killifish is frustrating. But I think that’s because they didn’t have taste of the beauty and the sense of achievement of it. You will accompany them all their whole life cycle, from egg to a new egg.

Is it difficult to care Killifish?

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