Final answer:
A shark using an aquatic cleaning station is an example of commensalism, not a mutualistic relationship.
Step-by-step explanation:
In biology, a mutualistic relationship is a type of symbiotic relationship in which both species involved benefit from the interaction. However, the statement 'a shark using an aquatic cleaning station' is not an example of a mutualistic relationship.
In this scenario, the shark is the beneficiary of the cleaning service provided by other organisms, such as cleaner fish or cleaner shrimps, but the cleaning organisms do not receive any direct benefits from the shark. This interaction is an example of commensalism, where one organism benefits and the other is neither harmed nor directly benefited.