Some people work at fish farms and hatcheries. This job often involves dealing with a lot of freshwater fish, like koi, trout, betta, and guppies. There are also some saltwater species involved like tropical discus breeds, cod and clownfish. When you get involved with this field, you will need to help fertilize fish eggs, and then raise various species in large ponds, tanks or aquariums. Many of these facilities have filters in order to keep pollutants and bacteria out. You will also have to provide the fish with the right food so they are raised properly. This way they can then be released into natural habitats and environments like rivers, ponds, lakes, and oceans.
There is typically some know-how and training involved with working for a fish hatchery. While you need to understand the difference between freshwater and saltwater species of fish, you also need to know how to properly care for the fish. Once they are raised, some may be sent to local pet stores for people to buy as pets, while others will be released into state park streams, ponds and local rivers. Depending on the federal regulated or state hatchery you are employed with, your job responsibilities may vary. The salary you earn will also vary depending on your level of experience, and the hatchery you work for. There are certain regulations you will need to follow when fertilizing fish eggs and raising trout, cod, and koi.
In this line of work, you are going to deal with a number of other hatchery professionals, as well as all kinds of species of fish.