Betta Spawn Log : BSL20180305 : HM Blue (M) x HMPK Koi (S)

The male Betta is the last surviving Half-Moon (HM) and oldest Betta in our collection. Historically, the male Betta, due to boredom and limited tank size, it has been biting its own tail for a while. Thus, we've decided to find this male Betta a mate.

Male: HM Blue
Size: Medium
Age: 8+ months
Temperaments: Cowardice.
Size: Medium (3cm body only)
Grade: B

One of the last surviving HM which have gone through several outbreaks and managed to survive. However, too easily get bored and constantly biting its own tail. Although the tail have grown back and the male is getting older, we decided to breed it while we can.

Female: HMPK Koi
Age: 3+ months
Temperaments: Soft and nimble.
Size: Small (2.5 cm body only)
Grade: C

We called her "pimple" as you felt like pinching her eggs like a pimple. Furthermore, the female has the biggest number of eggs we've seen so far in any other female we have. Probably the healthiest female so far as well.

Log Notes
Mating was fast and lots of eggs produced. Gross estimation was roughly around 100-plus. We expected this number will reduce further as the fry grows.

Female was removed as we saw the male Betta shown some aggression towards it. We placed the female in another individual quarantine tank but near the female sorority tank. There was no damage to any of its fins and the mating was less aggressive.

Fry have started to swim freely and growing fast. Interestingly the fry have been following the male Betta where he chased them around and took them back to the bubble nest. Both were in good condition. We have started to feed BBS to the fry. We don't expect much problem from the spawn but expect the surviving rate will be around, on average 30 till 40 due to our chosen spawning method.

Bad news. We can't find any fry in the breeding tank and the male Betta seemed quite depressed, inactive most of the time, and hiding under the plants. There are probably two conclusions. First, water quality of the breeding tanks causing infection to all fry. Second, the male Betta was under stress and ate all the fry. Maybe this was due to a Giant female Betta placed near the breeding tank? We siphoned the breeding tank and replace 10% of the tank water. We will wait and see until tomorrow on whether we should quarantine the male Betta so it can heal itself.

While searching through the net, we concluded that the fry was eaten by the male Betta was mostly likely post-breeding depression, not all but some. HM was known as a type of Betta fish which was easily scared and sensitive to water quality. Something must be happened when we added water or moving the aquarium plants.

The male Betta is currently doing quite well and we have added more water to the breeding tank. The next step is to train the male Betta so it will get more accustomed to us. Maybe playing with it using our hands or some sticks would help in some way or another. For next breeding project, we will add more Indian Almond leaves extract and floating aquarium plants to create a more dark water condition.

1/ Breeding HM (Half-Moon) Betta was quite difficult and not recommended for beginner breeder. Go for HMPK (Half-Moon Plakat) instead. HM was easily spooked and leads to the Betta bitting its own tail or eating its own fry.

2/ If there are size mismatch, the female may bitten off the fins of the male HM Betta. On average, we seldom see large size HM betta, most HM are quite small (body size) compare to HMPK Betta.

3/ Leaving fry with father method is not a suitable method for HM unless you change the water on daily basis and keep the male Betta (father) happy or safe. 

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