It definately looks like the black saddleback clownfish. There are 2 different types. There is the brown saddle with an actual white saddle stripe, and the there is the black with a full middle bar. This is the black variety.
There is alot more then two variants of saddlebacks. There is 4 different types of clowns
Clarki Complex
Saddleback Complex
Skunk Complex
Percula Complex
Inside of those complex's is variants of color and marking.
The species in question is Amphiprion Polymnus. The picture is of the black variation. Clarkii's, Skunks, and Percula clownfish are all different species in the Amphiprion family. Clarkii's are Amphiprion Clarkii, Skunks are Amphiprion Akallopisos, and Percula's are Amphiprion Percula. There are also many more types of clowns out there then 4. The saddleback is one of many in a large sub-family of damsel fish. For more information on clownfish species, go here: The Clownfishes, Damsels of the subfamily Amphiprionae, Part 1