Fish doctor or Doctor fish may refer to:
Lycodes terraenovae, also called the Newfoundland eelpout, Atlantic eelpout or fish doctor Gymnelus viridis of genus Gymnelus, or fish doctor Red garra (Garra rufa), also known as the doctor fish or nibble fish Doctorfish tang (Acanthurus chirurgus), also known as the doctorfish Tench (Tinca tinca), or doctor fish
See also Fish medicine Fish (surname) Acanthuridae, a family of ray-finned fish which includes surgeonfishes