Sperm whales have complex matrilineal social structures and cultural traditions that are disrupted by strandings, entanglement, and vessel noise.
Sperm whale welfare cannot be understood without their social context. The loss of matriarchs disrupts clan knowledge accumulated over decades. Noise pollution impairs the echolocation essential for deep-water squid hunting. Social bonds that span lifetimes create attachment relationships where individual deaths cause group distress analogous to grief.