While "symbiosis" is often associated with mutualism, where both organisms benefit, it's actually a broader term encompassing any relationship where two different species live closely together. There are three main types of symbiotic relationships:

* Mutualism: Both organisms benefit from the interaction. (e.g., clownfish and anemones)

* Commensalism: One organism benefits, while the other is neither harmed nor helped. (e.g., barnacles on a whale)

* Parasitism: One organism benefits at the expense of the other. (e.g., tapeworms in a human gut)

So, while mutualism is a type of symbiosis, not all symbiotic relationships are mutually beneficial.