no
No. If you exclude the length of the tail (caudal) fin in some male guppys, under normal circumstances, female guppys grow to around double the size of male guppys
Bettas will eat baby guppys as will most other fish, but in general, male Bettas will only fight with other male Bettas. They do not fight with other species of fish
When female and male Oscars fight, the female Oscar ends up being raped. So, no.
The males fight for the female. Not usually with the female. In general, the male will harass the female to breed, but not fight with it.
Most likely the female will fight with the male, because females a extremal territorial.
He inserts his "gonopodium" into the female guppys' "cloaca" and his "milt" is released and meets up with and fertilises the "ova". The fertilised "ova" remain in the female fish until they have developed into "fry", then they are released into the environment.
Yes, but only female-female, or male-female. Male-male are liable to fight even if both neutered.
male+female= babies male+male = might fight female+female= might become friends
Only male Bettas fight and they will only fight with other male Bettas. A male Betta will kill the female if she will not spawn with him. He will also kill her after she has spawned if she is not removed.
Only male Bettas fight and they will only fight with other male Bettas. A male Betta will kill the female if she will not spawn with him. He will also kill her after she has spawned if she is not removed.
they shouldn't fight. if male and female fight, there is a problem.
hamsters fight for dominance it always happens male male female female and male female all you can do is watch if it gets out of hand separate them hamsters are also solitary and they don't need company so don't feel bad separating them