My adult zebra danios keep fighting all over the tank and it looks really bad. Is this a mating ritual or something? One keeps brutally DESTROYING the other one. The male has been chasing the females for 2 weeks now. Now he's fighting with the older female. Can I please have info on their breeding habits and what to do and if they are breeding? He's going more insane than any other fish I have ever seen. He's splashing water because the fight is so intense. Now he also likes to chase EVERY female in the tank. Any help is great! Thanks in advance!