The Two Bigger Platys Are Male And Female The Female Currently Has A Big Fatt Stomach With A Few Black Dots So Im Pretty Sure That Shes Pregnant And The Male Is Just Being Very Defense Of her When The Other Platys Come Near.
Platies have a pecking order and big platies bully smaller ones. The males don't protect the females as such, they will chase other males away so they can breed with the females.
Agree. I had a male platy that followed a female everywhere. Would chase the other males off. He just wanted to be sure he was first in line for next breeding. He got outfoxed once and then the new daddy became alpha male. Funny!