| Name | Description |
| Cold Water Vibriosis | Caused by the bacterium Vibrio salmonicida (V. salm) and is a problem in farmed salmon. The disease is also called Hitra disease. |
| Infectious Pancreatic Necrosis | Used to be a disease of first-feeding fry in the freshwater phase, in recent years it has become a serious problem in marine salmonid farming. Salmonids are predominantly susceptible, particularly brook trout, brown trout, rainbow trout, Atlantic salmon, Pacific salmon and Coho salmon. |
| Sea Lice | Sea lice is the common term used for one group of parasitic caligid copepods which occur naturally on fish world-wide. Copepods are crustaceans found in both marine and freshwater environments. Most are planktonic, while others are found living in the sediments. Some species are specialized to live as parasites, on or in host organisms at some stage in the lifecycle, although one or more stages are free-living as plankton in the water, usually during the early stages of development. |
