It depends on the species. Wild type Betta Splendens and similar wild Bettas like smaragdina, imbellis and mahachai weigh approximately 1.2 grams
Domestic veiltail and halfmoon Splenden types are around 1.9grams while the new Giant strains of Betta Splendens are 8.8 grams approximately.
The weights will vary from fish to fish as well as depending on when they were fed last so this only a general idea of weight.
When they first develop from the ova and start to wriggle they are about as thick as a hair and around 3 millimeters long. They are best observed with a magnifying glass.
yes
Go to petsmart and ask a person there to show you witch is best for your baby betta fish.
Hundreds is typical although some will die young.
They look just like Big betta fish, but smaller.
baby bettas are called fry
None are recommended if the Betta is a male.
it looks like they have a big bubble in their side
No
A pinch of fish food once a day
The average is 1.5 inches
The Betta probably likes BIG spaces best
a betta bowl is about 12-15 inches in length and about the same in height