These are true mini mealworms. Not newly hatched normal mealworms. These mealworms grows to a maximum size of 1cm and are less than 1mm thick. I've managed to get some of these mini mealworms from a relative of mine 3 weeks ago and have been experimenting with them. One thing for sure, my bettas LOVE them!
I've always envy Arowana hobbyists, they have a wide range of live food selection (think Super Giant Mealworms). Betta hobbyist are limited to live food which small enough for the betta. These live food are typically tubifex worms, brine shrimps and mosquitoes larva. Tubifex worms are notorious, brine shrimps are too salty and mosquitoe larva are illegal. None of these live feed are easily cultured and sustainable.
Finally I have access to a live feed that is safe, nutritious and "relatively easy" to culture. Notice I said relatively easy. I have been keeping notes on the live cycle of these mini beetles and they are not very easy to care for. Mini mealworms are picky eaters, have long egg-larva hatch time and their cultures are prone to molds. I will be keeping track of their life cycle to work out if these worms are sustainable. Hopefully I'm able to produce enough yield to share with betta hobbyist in Singapore. Exciting time ahead for betta hobbyist!
PS: If anyone knows the scientific name of these mini mealworms, do post in the comments. Thank you.