Alphabetical listingAlphabetical listing
Fish Pathogens
| Acanthocephalans | Thorny-headed worms. |
| Ambiphrya | Sessilid ciliate. |
| Apiosoma | Sessilid ciliate. |
| Argulus | Fish Louse. Parasitic crustacean |
| Camallanus | Worm parasite ("Gut worm"). |
| Capillaria | Intestinal worm parasite. |
| Chilodonella | External ciliate protozoan. |
| Columnaris | Now Flavobacterium columnare, a bacterial pathogen. |
| Costia | Now Ichthyobodo, an external flagellate. |
| Cryptobia | Flagellate from intestine of Heros severum. |
| Dactylogyrus | And other Gill Flukes (Monogenea). |
| Dermocystidium | On the Clown Knife fish, Notopterus chitala. |
| DIGENETIC FLUKES | Guide to pages on Digenetic trematodes. |
| Digenea in gills | Metacercaria in cysts in fish gills. |
| Eimeria | Coccidian sporozoan from goldfish. |
| Epistylis | Sessilid ciliate protozoan |
| Heteropolaria | Sessilid ciliate protozoan |
| Gill Flukes | Formerly: Monogenetic Trematodes. |
| Gyrodactylus | Skin flukes, Monogeneans. |
| Hexamita | From Synodontis brichardi |
| Ichthyobodo | Costia, an external flagellate. |
| Ichthyopthirius | Ich or White spot disease. |
| Lepeophtheirus | Sea Lice from salmon. Parasitic copepod crustacean |
| Lernaea | Anchorworm. Parasitic copepod crustacean. |
| Livoneca | Parasitic isopod. |
| Loma | Sporozoan from gills of Coho Salmon |
| Lymphocystis | Viral disease on fins of Ram cichlid and Scats. |
| Nyctotherus | Intestinal ciliate protozoan in Discus. |
| Oodinium. | Parasitic dinoflagellate. Velvet disease. |
| Piscinoodinium. | New name for Oodinium, Velvet disease. |
| Pleistophora | A sporozoan also known as Neon Disease. |
| Protoopalina | Commensal protozoan from Discus. |
| Pseudocapillaria | New name for Capillaria. Intestinal worm. |
| Saprolegnia | An aquatic fungus. |
| Scyphidia | Sessilid peritrich ciliate. |
| Sphaerospora | Sporozoan from gills of goldfish. |
| Spironucleus | From Angelfish (Pterophyllum) |
| Tetrahymena | External ciliate protozoan from guppies |
| Trichodina | Peritrich ciliate protozoan |
| Trypanosomes | Flagellate blood parasite. |
Disorders of fish for which a causative pathogenic organism is not named.
| Dropsy | |
| Kuhli Loach hemorrhagic syndrome | |
| Melanoma on betta | |
| White bumps on Platies, Mollies, and other Poeceilids | |
Non-pathogens 
Various organisms you may encounter in the aquarium. Includes:
hydra,
leech,
mite,
mosquito larva, Wolfsia,
oligochaete worms, and planaria.
Mosquito eggs, larvae, and pupae are shown on their own page.
| Main Page |