What are some super awesome cool examples of parsitism and commensalism?

Its for science class, and so far ive got nothing.


It has to be an example that will make my class go "WOW!"


And don't say the pearl fish going into the sea cucumber, we know that already.|||Ants can be seen feeding on the suguary discharge of aphids and in turn the aphids are protected from predators by the ants.





The rhino has a symbiotic relationship with oxpeckers, also called tick birds. In Swahili the tick bird is named "askari wa kifaru," meaning "the rhino's guard." The bird eats ticks it finds on the rhino and noisily warns of danger. Although the birds also eat blood from sores on the rhino's skin and thus obstruct healing, they are still tolerated.