I saw this pair too, and they've been sold already. I know next to nothing about sharks, but do know these guys are an 'expert only" fish: extremely difficult to just keep alive. As far as breeding; again I'm no expert with sharks, but have bred many difficult FW and a couple SW fish.(actually, the fish did the breeding, I just supplied the environment).IMO, the chances of them reproducing in a home tank, no matter how large, would be almost nil. Very, very few SW fish have ever been bred in captivity...maybe 98% of the fish we keep have not.. I can't imagine a pair of 3' sharks reproducing; but you might be the 1st.