Aeromonas is a type of bacteria that is commonly found in fresh and brackish water. This germ can cause disease in stressed fish and amphibians. Aeromonas spp. can cause discoloration of the limbs of amphibians and the fins of fish and can cause internal bleeding in these aquatic animals.
Though it very rarely happens, people can become infected when they handle infected fish or accidentally swallow contaminated food or water. If these germs are swallowed, Aeromonas infections can cause nausea, vomiting, and diarrhea. Skin infections can happen if the bacteria get into open wounds or scrapes. More severe disease can happen in children or people with weakened immune systems.
Practicing healthy habits, including hand washing, will reduce the risk of Aeromonas infection.
From the Center for Disease Control and Prevention (CDC)