So I'm well aware there isn't much, if any evidence it was social but having coexisted with similar sized predators like megalodon I think the possibility of it being a group hunter isn't too out there, in fact it'd probably reduce competition as megalodon would only target lone, sick or young individuals (and vice versa) and usually avoid tightly coordinated groups due to obvious numerical advantage and the risk of getting mobbed and ganged up on like large sharks and similarly sized cetaceans. I've heard livyatan died out before megalodon too but due to the scarcity of the former's fossils compared to the latter I think it'd best be taken by a grain of salt. Idk, would just like to hear y'all's two cents.

https://preview.redd.it/8agxw4okkcyg1.jpg?width=5712&format=pjpg&auto=webp&s=fdae9d2ab96bb4600e8ca6bed01a45409969f2bd