Eusocial organisms like a colony of ants are best viewed as a single organism. They share the same genes, and crucially the drones do not reproduce. The colony or hive reproduces.
But a single cod or zebra or human can't survive alone -- we survive in groups. As Jordan Peterson said, there is no such thing as "a" cod.
The difference between eusocial organisms and normal organisms is that eusocial organisms can't have conflicts between individuals.