What are two species of flukes that attack aquarium fish, and what are the symptoms and treatments

for each?

Two species of flukes that can cause problems are Dactylogyrus and Gyrodactylus. Resulting damage from
both can be fatal, depending on the degree of infestation. Flukes are tiny, worm-like parasites that attach
themselves to the gills and body of a fish. They have numerous hooks on the rear part of their bodies
and sucking mouths. A single fluke has both male and female reproductive organs (hermaphroditism).
Dactylogyrus permanently attach themselves to the gills. Fish affected with Dactylogyrus will have rapidly
moving gills, swim at the surface, and pant heavily, trying to obtain more oxygen. Their gills will be covered
with slime, and parts of the gills may be eaten away. Fish may also scrape their bodies up against objects
trying to relieve the irritation. Gyrodactylus primarily attach themselves to the body of the fish. The infected
fish will also scrape up against objects; their color will fade; the fish will produce more slime in response to
the irritation; and the fins may also become ragged and eaten away. Commercial treatments are available at
pet stores with fish supplies. Infected fish should be removed and treated in a hospital aquarium quarantine.
The aquarium that the fish were removed from should be thoroughly cleaned before returning fish to it.