bumblebees can get aggressive but that is usually only if their numbers are off. with cichlids its all about the right numbers for the most part. There are species that are just mean as all can be though
i have a few bumblebees they cruise around and get into everything but i like em. Biggest thing you need to remember with stocking is numbers and genders. Ive had an all male peacock tank and you'd think it would be a gladiator academy. Nope, chill tank with lots of color. Now my amazonian tanks.......they are mean. My new Jaguar cichlid tank will be rough.