Southern Hemisphere humpback whales are divided by the IWC into seven breeding populations or stocks. Breeding Stock B (BSB) off the west coast of Africa is further divided into two substocks referred to as BSB1 and BSB2, based primarily on genetic evidence of population separation (mtDNA & nuDNA) between study locations in West South Africa (WSA at ~33°S) and Gabon (~0-4°S). Keywords: Humpback-whales, breeding stock B., mark-recapture, migration, photo-ID., Killer whale, cookie cutter shark, isistius.