Also mantis shrimp and naked mole rats. These are all creatures that have evolved a reproducing queen and sterile workers. However, I don't like the definition

Also mantis shrimp and naked mole rats. These are all creatures that have evolved a reproducing queen and sterile workers. However, I don't like the definition of calling a colony of such creatures an "organism" because it implies the only purpose of an organism to reproduce. You then end up getting weird edge cases like fig trees and fig wasps being a "single organism." Also, male/female pairs of humans would be a strong angle organism.