The average is 1.5 inches
No
A Betta Fish or Siamese Fighting Fish are only a few inches. The females grow to about 2.5" and males grow to 3".
Betta fish grow to be an average of 2 inches from head to the beginning of the tail.
No.
you don't
They look just like Big betta fish, but smaller.
Yes a betta fish will grow back lost scales with time and clean water.
Betta fish grow paler and less active when they are sick or old.
it looks like they have a big bubble in their side
a long time
it depends on how small the bowl is betta fish usually dont grow larger then 3 or 4 inches
Yes, but slowely.