Some large fish allow smaller fish to swim inside of their mouths without eating the smaller ones. The smaller fish get food for themselves from the larger fish's mouth and at the same time remove parasites from its teeth. This is an example of

Question

Quizplus · Accepted Answer

This is an example of reciprocal altruism because both the large and small fish benefit from the interaction. The smaller fish get food, and the larger fish get a cleaning service, implying a mutual benefit without direct kinship or immediate reward, fitting the definition of reciprocal altruism.

Some Large Fish Allow Smaller Fish to Swim Inside of Their