| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 43.3 | 56.7 | 440 | 155 | 366 | 413 | 73.1 |
| Alligator sinensis | 46.1 | 53.9 | 462 | 171 | 361 | 380 | 60.7 |
| Caiman crocodilus | 46.9 | 53.1 | 485 | 159 | 307 | 423 | 24.1 |
| Crocodylus acutus | 42.9 | 57.1 | 413 | 177 | 352 | 432 | 32.9 |
| Crocodylus intermedius | 43.2 | 56.8 | 413 | 181 | 351 | 429 | 21.8 |
| Crocodylus moreletii | 44.0 | 55.9 | 423 | 182 | 350 | 418 | 25.4 |
| Crocodylus niloticus | 42.5 | 57.5 | 412 | 172 | 353 | 437 | 43.8 |
| Crocodylus novaeguineae | 43.7 | 56.3 | 424 | 176 | 345 | 429 | 24.6 |
| Crocodylus palustris | 43.1 | 56.9 | 416 | 176 | 350 | 432 | 31.5 |
| Crocodylus porosus | 43.0 | 57.0 | 419 | 172 | 350 | 433 | 41.7 |
| Crocodylus rhombifer | 43.1 | 56.9 | 413 | 179 | 356 | 426 | 38.2 |
| Crocodylus siamensis | 42.9 | 57.1 | 418 | 171 | 350 | 435 | 21.9 |
| Gavialis gangeticus | 43.1 | 56.9 | 438 | 154 | 345 | 437 | 28.8 |
| Mecistops cataphractus | 41.1 | 58.9 | 395 | 170 | 358 | 451 | 56.1 |
| Osteolaemus tetraspis | 39.0 | 61.0 | 367 | 169 | 385 | 453 | 70.0 |
| Paleosuchus palpebrosus | 48.8 | 51.2 | 500 | 169 | 298 | 404 | 24.1 |
| Paleosuchus trigonatus | 47.2 | 52.8 | 495 | 153 | 301 | 425 | 30.9 |
| Tomistoma schlegelii | 40.8 | 59.2 | 392 | 167 | 395 | 417 | 24.7 |