I go shark fishing regularly in the logan river and have eaten all the sharks that i have caught out of there, i catch them in the brackish water and its pretty muddy.
They are pretty average on taste unless you cook them with other stuff, i'm guessing that sharks from clean salty water would taste good, are an easy feed and alot of fun to catch. If your interested in rigs or baits to use for them just ask.
Hope this helps.
cheers
B.kennedy