Step 1: Understanding the Concept
Interactions can be mutualism, commensalism, parasitism, amensalism and others.
Step 2: The example
The clown fish lives among the stinging tentacles of a sea anemone and gets protection from predators, while the anemone is not affected.
Step 3: Compare the options
One partner benefits and the other is unaffected, which is commensalism.
Final Answer:
The association is commensalism.
\[ \boxed{\text{(C) }\text{commensalism}} \]