I don't know about you, but my memory could use some help when it comes to fish identification. Black tip reef sharks and the bright orange Garibaldi are easy to remember but the variations of damselfish and triggerfish can be overwhelming.

Fish ID guides, like those by Paul Humann, are a critical part of any divers bookshelf but they're not always the easiest to use if all you can remember is the general size or markings on a fish. What I've always wanted to see is a fish guide which cross-references their characteristics in greater detail and It looks like the folks at WikiDivers are doing just that.

Their fish identification guide begins with describing the characteristics of fish: body shape, fins, markings, gills, size, and body/fin configurations. Each of these includes a link to fish which have those characteristics. If your unknown fish had vertical bands, click the Bands link and a list shows you those with vertical bands.

There is a growing number of fish species already in the guide but it's a work in progress. While the main page is a great starting point with photos and links, the search results don't generate thumbnails. Bummer, because clicking through links for individual photos is no better than paging through Humann's book. The founders of WikiDivers have voiced their commitment to the site so hopefully their hard work will continue and produce an intuitive and thorough resource.