Well as far as jobs in the media, AKA, Hunt, Worsteling, Berg, Duigan and Hart, McGlashan and the like i think its all about having the gift of the gab and being able to sell your idea to the TV executives. Or start up your own production company and do the lot your self and just sell the program as a whole, which is the way i think most do it. Id be very surprised if any TV presenter has a Deg in Marine Biology, I dont think any of them are that smart.
As far as being a pro fisher your goal would be to end up in the States in the bass comps... thats where the BIG dollars are. Getting there you need to do well at state and national levels and a pocket full of money and them some..