It is an interaction between two species in which one species is benefitted and the other species is neither harmed nor benefitted. The species that benefits is the commensal and the other is the host.
- Orchids grow as epiphytes on branches of mango.
- Barnacles growing on whales back. Barnacles are arthropods and their larvae grow on the whale.
- Cattle ergets and grazing cattle – when the cattle graze the grass it flushes out the insects.The ergets feed on these insects.
- Clownfish living on the stinging tentacles of sea anemone protects itself from predators.