Aliivibrio salmonicida: A species of gram-negative bacteria in the genus ALIIVIBRIO. Aliivibrio salmonicida is the causative agent of cold water vibriosis, a HEMORRHAGIC SEPTICEMIA of ATLANTIC SALMON.Gadiformes: An order of fish including the families Gadidae (cods), Macrouridae (grenadiers), and hakes. The large Gadidae family includes cod, haddock, whiting, and pollock.Aeromonas salmonicida: A species of gram-negative bacteria, in the family Aeromonadaceae. It is strictly parasitic and often pathogenic causing FURUNCULOSIS in SALMONIDS and ulcer disease in GOLDFISH.Aliivibrio: A genus of gram-negative, rod-shaped bacteria in the family VIBRIONACEAE. They are found in the marine environment often associated with animals.Aliivibrio Infections: Infections with bacteria of the genus ALIIVIBRIO.Aeromonas: A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that occurs singly, in pairs, or in short chains. Its organisms are found in fresh water and sewage and are pathogenic to humans, frogs, and fish.Vibrionaceae: A family of gram-negative bacteria whose members predominate in the bacterial flora of PLANKTON; FISHES; and SEAWATER. Some members are important pathogens for humans and animals.