pilot fish

A pilot fish is a small fish that swims alongside larger, usually predatory, marine animals such as sharks or whales. It benefits by feeding on leftovers from the larger animal’s meals and gaining protection from predators due to its association. In a broader, metaphorical sense, the term "pilot fish" is used to describe someone who works closely with a more prominent individual or organization, often assisting or gaining advantages through that relationship. The relationship is mutually beneficial, with the pilot fish gaining safety and sustenance, and the larger animal benefiting from the fish’s loyalty or vigilance.