Do anemones have a symbiotic relationship with any other life form?

Yes, sea anemones have a symbiotic relationship with a couple of life forms.  One of these is the clownfish.  This fish lives within the anemones’ stinging tentacles and this provides it with safety.  From this relationship the anemone receives food in the form of scraps discarded by the clownfish.  The clownfish is able to live in the anemones tentacles because it has a mucus layer coating its body that makes it immune to the sting of the anemone.  The anemone also forms a symbiotic relationship with green algae, in much the same way that coral does.  The anemone provides safety for the algae to live and grow in the sunlight and in return the anemone receives oxygen and sugar from the algae.