The scarcity of killer whales in the Mediterranean is primarily due to the limited presence of their main prey items. Killer whales are apex predators and their diet consists primarily of marine mammals, fish, and seabirds. The Mediterranean Sea has experienced significant human-induced changes, including overfishing, pollution, and habitat degradation, which have resulted in the depletion of many of the key prey species for killer whales. Additionally, the Strait of Gibraltar presents a physical barrier and limits their movement into the Mediterranean Sea.