Kype and/or characteristics that could be of importance in inter- and intra-sexual evaluations of individual quality. The size of the kype is believed to determine male spawning frequency. The extinct sabertooth salmon, "Oncorhynchus rastrosus", was first named for its prominent premaxillary dentition. It possesses an enormous conical tooth on each premaxilla. There is no visible kype on the dentary, implying a different strategy for forming mate dominance. Kype A kype is a hook-like secondary sex characteristic which develops at the distal tip of the lower jaw in some male salmonids prior to the spawning season. The structure usually develops in the
Third Battle of the Hook defeated in heavy fighting. Just 30 minutes into 29 May, the Chinese forces launched another attack, but they were again beaten back. The Dukes began advancing up the line of the original trenches to dislodge the remaining Chinese forces in the forward trenches. The 'Dukes' secured the Hook at 03:30. For their action they were awarded the Battle Honour "The Hook" Between 19 May and 29 May, Chinese artillery fired over 20,000 shells onto the Hook position, and 11,000 of these shells were fired on the night of 28 May, with over 200 heavy calibre shells hitting the Hook positions