Commensalism is a type of symbiotic relationship where one organism benefits while the other is neither harmed nor helped. Here are 5 examples: 1) Barnacles attaching to whales, gaining transportation. 2) Epiphytes (like orchids) growing on trees, gaining sunlight access. 3) Remora fish riding sharks, eating leftover scraps. 4) Birds nesting in trees. 5) Cattle egrets following livestock, feeding on insects stirred up by their movement. These examples illustrate the diverse ways commensalism manifests in nature.