| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 44.4 | 55.6 | 445 | 246 | 421 | 443 | 73.1 |
| Alligator sinensis | 47.3 | 52.7 | 483 | 263 | 415 | 417 | 60.7 |
| Caiman crocodilus | 44.5 | 55.5 | 461 | 232 | 410 | 455 | 24.1 |
| Crocodylus acutus | 42.5 | 57.5 | 411 | 251 | 440 | 455 | 32.9 |
| Crocodylus intermedius | 42.3 | 57.7 | 408 | 250 | 442 | 457 | 21.8 |
| Crocodylus moreletii | 42.1 | 57.5 | 409 | 247 | 440 | 456 | 25.4 |
| Crocodylus niloticus | 42.8 | 57.2 | 416 | 250 | 436 | 455 | 43.8 |
| Crocodylus novaeguineae | 43.6 | 56.4 | 426 | 253 | 420 | 458 | 24.6 |
| Crocodylus palustris | 42.3 | 57.7 | 420 | 239 | 434 | 464 | 31.5 |
| Crocodylus porosus | 44.0 | 56.0 | 433 | 252 | 417 | 455 | 41.7 |
| Crocodylus rhombifer | 42.5 | 57.5 | 412 | 250 | 436 | 459 | 38.2 |
| Crocodylus siamensis | 44.1 | 55.9 | 432 | 255 | 417 | 453 | 21.9 |
| Gavialis gangeticus | 42.6 | 57.4 | 415 | 242 | 426 | 460 | 28.8 |
| Mecistops cataphractus | 41.6 | 58.4 | 409 | 253 | 457 | 474 | 56.1 |
| Osteolaemus tetraspis | 41.7 | 58.3 | 397 | 251 | 455 | 452 | 70.0 |
| Paleosuchus palpebrosus | 47.0 | 53.0 | 500 | 235 | 378 | 451 | 24.1 |
| Paleosuchus trigonatus | 47.5 | 52.5 | 500 | 238 | 377 | 440 | 30.9 |
| Tomistoma schlegelii | 42.7 | 57.3 | 431 | 246 | 437 | 470 | 24.7 |