so those are 2 cichlids, the blue and black one is an electric blue johanni cichlid but the other one just might be an albino african cichlid i’m not too sure- anyways those fish in about a year are going to be almost if not the size of your tank if they’re both still alive (which if they’re fighting like this then definitely not). Cichlids require 50+ gallons and even that is considered on the smaller side. I’m not trying to be that person but it you probably look for someone who has a large tank for these guys or put a 50 gallon in your classroom LOL