Glo Tetra Having Birth. Females do swell when carrying eggs,. Watch a pregnant guppy fish having babies, in breeding tank giving birth to 41 babies(fries) and unfertile eggs.
They can swim in reverse direction too. To see if your neon tetra is pregnant, you need to keep a close watch and see if the female looks fatter. Therefore, the lack of sunlight in the habitat has lead to the fact, that tetra eggs and larva almost can’t stand the sunlight.