Pregnant Danio Glofish. Glofish are egg layers, so she can't be pregnant. Technically speaking, if there are males around and they are developing eggs, they should not be carrying.

A swollen belly means a female glofish is ready to drop eggs. When the condition of the tank is suitable, they lay eggs every few days. Like the other genetically similar fish, such as tetras and danios, they are egg layers and do not bear live offspring, so technically, glofish can not undergo pregnancy.