aggressive betta

As my username implies, I am a total fish newb, and I need help! I was recently given a well-meaning but perhaps not very well-informed gift of a lovely male betta. I am an animal-lover, but have never owned a fish in my life. He is a beautiful (extremely grumpy) black veiltail with red fins...

I'm probably going to be getting a new betta soon since my betta Comet is about to die. :cry: Anyway I am going to be keeping my betta with corydoras, so I need to get one that will get along with other fish. Is there anyway to tell if a betta is super aggressive just by watching it in the...

I'm rather curious as to what the most aggressive type of betta is? I've heard plakats followed by crowntails were pretty aggressive, and half-moons being the most "insecure" or shy. For me it's the opposite. I've got a shy crowntail and a half-moon with an attitude. I wonder if color has...