I have a pair of tank bred Ocellaris clowns that started hosting an anemone about a week after I added it to the tank. I have since moved the clowns to another tank without a nem and they now host some frogspawn.
Also, most clownfish sold these days are tank bred with only a small % being wild collected. There is a push within the industry to get some standardized naming in place for marine fish:
Wild Collected / Caught / Harvested : The organism is taken directly from the wild and put in an aquarium.
Tank Conditioned / Captive Conditioned : Wild collected organisms kept in tanks, conditioned to eat commercial aquarium foods, and accustomed to tank conditions.
Tank Raised / Captive Raised : Eggs or pre-settlement larvae collected in the wild, then grown or raised in tanks in facilities on land.
Tank Bred / Captive Bred : Organisms that were spawned and raised in tanks / captivity in facilities on land.