Great news for sharks from Chile and the Bahamas but the real challenge is on the other end of the economics of killing sharks.
To really save sharks is to go after demand. That's the people who eat shark fin soup.
A huge shark sanctuary has been declared in the Bahamas and Chile has banned finning. As noted in Treehugger, "Illegal shark catches are unfortunately all too common, and with demand for shark fins still high in the world market, countries instituting bans on commercial fishing will have to put in the effort to ensure the bans are followed."
As uncomfortable as it may be to tell people what they should or should not do, shark fin soup is the poster child for abuse of the natural world.