Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Alosa alosa, 48.1, 51.9, 405, 342, 367, 440, 10.0, Alosa pseudoharengus, 47.7, 52.3, 406, 334, 366, 445, 8.0, Alosa sapidissima, 47.9, 52.1, 406, 338, 366, 444, 13.0, Clupea harengus, 48.8, 51.2, 413, 345, 358, 437, 22.0, Clupea pallasii, 48.9, 51.1, 413, 345, 355, 437, 19.0, Clupeonella cultriventris, 47.7, 52.3, 399, 341, 370, 440, 5.0, Dorosoma cepedianum, 47.6, 52.4, 408, 331, 361, 451, 6.0, Dorosoma petenense, 47.4, 52.6, 410, 326, 361, 456, 4.0, Harengula jaguana, 48.3, 51.7, 408, 341, 367, 435, 3.0, Potamalosa richmondia, 47.8, 52.2, 416, 327, 357, 454, 11.0, Sardina pilchardus, 49.5, 50.5, 404, 363, 366, 417, 15.0, Sprattus sprattus, 48.5, 51.5, 409, 344, 358, 441, 6.0,