11-04-2010, 12:11 PM
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Originally Posted by Jbb421
Thanks for all the replies... today i noticed my angel being extremely aggressive towards my corydora.... this is the first time he has ever done this that ive seen... any idea what could be the cause the corydora was in the tank ages before the angel idk if that helps any but
Angelfish are cichlids as you probably know. One trait of all cichlids is their sense of territory; they own the space around them, often the tank. And for some reasons Corydoras are frequently targeted. I have a pair of Bolivian Ram in my 115g and there are some of the corys that they do not tolerate. In my 90g I have a pair of dwarf Apistogramma, and they have taken a dislike to the panda corys. They never actually engage in physical combat (I would remove the cichlids if they did) but the cichlids make their intention clear.
With angelfish, they are shoaling by nature, living in groups in the wild, and they establish a "pecking order" within the group; having 5+ angels usually means this remains within the group (except if a pair should spawn of course) and 5 or more also means no single subdominant fish is likely to be picked on. This is why it is recommended that angels be in a group in a 55g or larger tank. Your angel may change its behaviour when you have a larger aquarium, but it is just as likely it will not change. Should you consider more angels, be warned that when "new" angels are introduced to a tank with one dominant angel, the new fish frequently end up being harassed a lot and the stress can kill them. Some stores will accept fish on exchange, you might want to consider this.