| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 42.1 | 57.9 | 404 | 265 | 344 | 577 | 73.1 |
| Alligator sinensis | 45.5 | 54.5 | 423 | 296 | 336 | 524 | 60.7 |
| Caiman crocodilus | 43.2 | 56.8 | 414 | 274 | 336 | 568 | 24.1 |
| Crocodylus acutus | 42.8 | 57.2 | 383 | 300 | 338 | 573 | 32.9 |
| Crocodylus intermedius | 43.0 | 57.0 | 388 | 298 | 334 | 574 | 21.8 |
| Crocodylus moreletii | 42.7 | 57.3 | 386 | 295 | 335 | 579 | 25.4 |
| Crocodylus niloticus | 43.3 | 56.7 | 386 | 303 | 337 | 567 | 43.8 |
| Crocodylus novaeguineae | 43.5 | 56.5 | 394 | 300 | 324 | 577 | 24.6 |
| Crocodylus palustris | 42.9 | 57.1 | 393 | 291 | 332 | 577 | 31.5 |
| Crocodylus porosus | 42.9 | 57.1 | 389 | 294 | 338 | 572 | 41.7 |
| Crocodylus rhombifer | 43.3 | 56.7 | 389 | 301 | 331 | 572 | 38.2 |
| Crocodylus siamensis | 42.9 | 57.1 | 389 | 296 | 336 | 576 | 21.9 |
| Gavialis gangeticus | 44.5 | 55.5 | 415 | 295 | 340 | 544 | 28.8 |
| Mecistops cataphractus | 42.8 | 57.2 | 386 | 294 | 344 | 566 | 56.1 |
| Osteolaemus tetraspis | 42.7 | 57.3 | 384 | 296 | 355 | 559 | 70.0 |
| Paleosuchus palpebrosus | 46.3 | 53.7 | 451 | 283 | 292 | 561 | 24.1 |
| Paleosuchus trigonatus | 45.6 | 54.4 | 443 | 281 | 298 | 564 | 30.9 |
| Tomistoma schlegelii | 44.2 | 55.8 | 410 | 299 | 354 | 542 | 24.7 |