Biological cleaners
Fish often succumb to cryptocaryonosis despite the presence of biological cleaners such as cleaner shrimp or cleaner wrasse. While cleaners will exhibit their instinctual "cleaning" behaviors, do not assume that they eat trophonts, or eat them in sufficient numbers to affect a cure. "Cleaner" species of fish are also subject to infection.
Alexandra Grutter studied the stomach contents of the common cleaner wrasse or Labroides dimidiatus and found that their diet consists of gnathiid isopods, scales, copepods and non-parasitic copepods (Grutter, 2000). Cryptocaryon irritans was not found in the stomach contents indicating that it is not a part of their diet.