Simple Summary Amoebae can be found in many different aquatic environments and are
also an emerging risk for fish health. Amoebae can display different types of relationships
with fish, some of them (amoeba acting as commensals) do not harm fish. However, in many
cases they can act as parasites and can be the cause of severe diseases affecting mainly
the gills and also causing relevant systemic infections. Abstract Parasitic and amphizoic
amoebae are ubiquitous and can affect a huge variety of hosts, from invertebrates to …

Parasitic and amphizoic amoebae are ubiquitous and can affect a huge variety of hosts, from
invertebrates to humans, and fish are not an exception. Most of the relationships between
amoebae and fish are based on four different types: ectocommensals, ectoparasites,
endocommensals and endoparasites, although the lines between them are not always clear.
As ectocommensals, they are located specially on the gills and particularly the amphizoic
Neoparamoeba perurans is the most relevant species, being a real pathogenic parasite in …