Some fish take advantage of for the removal of external parasites. The best known of these are the of the genus found on coral reefs in the and . These small fish maintain so-called "cleaning stations" where other fish, known as hosts, will congregate and perform specific movements to attract the attention of the cleaner fish. Cleaning behaviours have been observed in a number of other fish groups, including an interesting case between two cichlids of the same genus, , the cleaner fish, and the much larger , the host.
Below are some life cycles of fish parasites:
Be aware that some live fish foods, such as cyclops and water fleas, can be the intermediate hosts of many of these parasites, unless you are certain the fish food items come from a fish-free water source.
Parasites of Freshwater Fish | Minnesota Sea Grant
This publication is one in a series of pictorial guides that is designed to assist in the identification of common freshwater fish parasites. The publications included in this series are:
Fish Parasites - UF's EDIS - University of Florida