Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Alopias pelagicus, 31.0, 69.0, 41, 11, 50, 66, 29.0, Alopias superciliosus, 31.5, 68.5, 41, 12, 51, 64, 21.0,