Plankton is not the name of a plant or animal but more of a category for any drifting organism that inhabits the middle to upper levels of the ocean, namely the pelagic zone.
Most vets do spays, neuters, bone surgeries, spleen surgery, tumor removals, and intestinal surgeries. Heart surgery and more complicated surgeries are done by specialists that requires more schooling. If you want to be a vet, you have to have REALLY good grades and Vet school is MUCH harder to get into than human medical school.
Veterinary assistants and laboratory animal caretakers play a large role in helping veterinarians and scientists with surgery and other minor procedures. They may prepare equipment and pass surgical instruments and materials to veterinarians during surgery.eterinary assistants and laboratory animal caretakers play a large role in helping veterinarians and scientists with surgery and other minor procedures. They may prepare equipment and pass surgical instruments and materials to veterinarians during surgery.