Below is a video of ciliates from the Genus Philaster eating coral tissue on a Acropora formosa colony at the Horniman Museum and Gardens Aquarium. Taken by Jamie Craggs, Aquarium Curator.

This video shows ciliates eating a Favia fragum coral at the Horniman Museum and Gardens Aquarium. Taken by Jamie Craggs, Aquarium Curator.

This video deposited on you tube shows the same species of ciliates as above, devouring a coral spat. This shows they eat live tissue not just the dead and decaying tissues at disease lesion interfaces.