Which branch of zoology studies fish?

The branch of zoology that studies fish is called ICHTIOLOGY, from the Greek ichthys – fish and logos – the word. That is, literally it sounds like the science of fish.
Ichthyology studies not only the structure and functioning of the organism of various fish, but also the history of their origin, habitat conditions, feeding and reproduction of a particular species.
This is a very ancient science that dates back to the sixth century BC.
Thanks to her, many scientific discoveries became possible, for example, in the field of hydroacoustics and sonar. It also helps the development of fisheries.