Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Balaena mysticetus, 42.3, 57.7, 3481, 1319, 2948, 3601, 211.0, Eubalaena australis, 42.0, 58.0, 3446, 1320, 2980, 3604, 70.0,