Commensalism is important in an ecosystem because:
In the environment, commensalism is crucial because it allows diverse species to interact and coexist without inflicting harm.
Commensalism:
In biology, commensalism refers to a relationship between individuals of two species in which one derives food or other benefits from the other without harming or benefiting the latter.
The commensal, which is considered a species, benefits from the relationship and receives benefits from the unaffected host species in the form of shelter, support, nourishment, or mobility.
In most cases, a larger host and a smaller commensal form a commensal relationship.
The remora (family Echineidae), which rides connected to sharks and other fish, is one of the most well-known examples of a commensal.