Sharks (The Discovery Channel CD-ROM, CD-ROM for PC/Windows and Mac, $49.95) The Discovery Channel's line of interactive discs of which Sharks is the fourth title are very much like coffee-table books unstuck in time. This one packs in undersea film footage and video interviews with shark researchers to pep up the informative text. Courageous and/or suicidal shutterbugs will find the tips on shark photography especially helpful, but a superfluous Concentration-like game is a waste of disc space. Impressively, the overall message is sharply preservationist even Jaws author Peter Benchley remarks that he'd make his Great White the good guy if he had to do it all over again. B+

