It was a required course of study for an Animal Science degree program (lots of pre-veterinary students) and the "behavior" of animals wasn't? taught as a "hard" science at all. The professor wasn't compelling and was the object of widespread open student ridicule. Class discussions were highly descriptive of observed behavior with ample amounts of unprovable anthropomorphizing about assumed motives for observed behavior that was taught as holy gospel. There was also an obvious class grading bias against fisheries majors while favorable grades were awarded to wildlife majors. (Animal lovers got a better grade than the fish heads, you might say.

) This latter fact was undisputed among students from all study majors
Got that paper! Then I worked in a LFS after graduation and nothing I was taught in that class was ever remotely useful for animal husbandry. It may have helped me with customer service as "making up to the teacher" is a useful skill for handling public interactions? I probably would have learned more useful information for dealing with customers if I had taken a wide study of psychology courses or animal husbandry, or microbiology and/or chemistry and even engineering would have been more useful than "Dog whispering 101."
I really want to name the school and the professor as the wounds are still raw from that University of California beat-down. I hope this kind of answered your question.
Like others have said, get a job working in a pro tank maintenance situation and then later you can either steal their customers or develop your own.

A job at the LFS is a great place to meet folk who would like tank service. I know a lot of folks who have done this and who enjoy what they do for a living. No animal degree required. I also should add a business major would be a lot more useful, imo. hth.