Soft Cover. Condition: Fine. First Thus. 53pp, bw photos, line drawings, figures, tables. . The primary empahsis of the publication is 'the five commercially exploited species of tuna, a short discussion on the billfish has been included because the waters off the Cape Peninsula are unique for recorded catches of black, blue, white and striped marlin and broadbill swordfish'. The first edition of 'The South African Tunas' in 1948 has been expanded to include a technology section.