“Ain’t” is another “wanna”. Practice doesn’t make perfect. Practice makes permanent.
Anyway, I don’t think this is necessarily true. Yes, fewer people are interested in fishery design and management. But while about 400 schools in engineering, a much smaller number (10? 20?) offer them fishery design and management.
Looking at which ones, I see a large number of state schools. Often they have less aid available for out of state and international students. You will need something around $130,000 in aid. This is a lot. It’s two years of median household income in the US. It’s ten years of median household income in the Mideast/North Africa.