Fish

PetMD Editorial

Lymphocystis disease is a common viral infection which affects the skin and fins of saltwater and freshwater fish. Although it is serious, it does not cause any health problems; the disease only disfigures...

PetMD Editorial

Carp pox is a viral disease which is caused by the herpesvirus infection. It is one of the oldest diseases seen in fish. As the disease weakens the fish with infection and lesions, it leaves the fish susceptible...

PetMD Editorial

Medical problems are not always the cause of aquarium or fishpond emergencies. Instead, they often deal with environmental issues. Reasons for EmergencyThese environmental issues may include: LeaksSpillsElectrical...

Sean Perry, DVM

Koi fish are an extremely popular and colorful form of the fish species Amur carp (Cyprinus rubrofuscus). These fish are commonly kept as an ornamental fish in outdoor ponds or garden water features. They...

PetMD Editorial

Image via iStock.com/GOLFX By Kenneth Wingerter As many of us progress as fishkeepers, we are attracted to weirder and weirder species. A few of us may have even liked the oddballs from the get-go. However,...

PetMD Editorial

As reef aquarists progress in the hobby, their eyes and hearts are drawn to increasingly unusual animals. Indeed, after mastering the care of corals (no small feat in itself), one might find themselves...