Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Aetobatus flagellum, 40.5, 59.5, 540, 203, 535, 555, 16.0, Pteroplatytrygon violacea, 38.6, 61.4, 531, 181, 559, 574, 24.0,