| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 42.5 | 57.5 | 565 | 206 | 475 | 566 | 73.1 | 
| Alligator sinensis | 46.5 | 53.5 | 605 | 237 | 453 | 517 | 60.7 | 
| Caiman crocodilus | 42.9 | 57.1 | 602 | 169 | 426 | 600 | 24.1 | 
| Crocodylus acutus | 43.6 | 56.4 | 582 | 229 | 455 | 594 | 32.9 | 
| Crocodylus intermedius | 43.7 | 56.3 | 579 | 233 | 456 | 592 | 21.8 | 
| Crocodylus moreletii | 43.3 | 56.7 | 579 | 227 | 459 | 595 | 25.4 | 
| Crocodylus niloticus | 45.1 | 54.9 | 587 | 249 | 446 | 573 | 43.8 | 
| Crocodylus novaeguineae | 43.6 | 56.4 | 583 | 228 | 454 | 595 | 24.6 | 
| Crocodylus palustris | 43.6 | 56.4 | 574 | 235 | 467 | 579 | 31.5 | 
| Crocodylus porosus | 45.1 | 54.9 | 593 | 244 | 439 | 578 | 41.7 | 
| Crocodylus rhombifer | 44.0 | 56.0 | 581 | 237 | 458 | 584 | 38.2 | 
| Crocodylus siamensis | 45.3 | 54.7 | 592 | 248 | 442 | 572 | 21.9 | 
| Gavialis gangeticus | 43.5 | 56.5 | 551 | 233 | 455 | 562 | 28.8 | 
| Mecistops cataphractus | 42.0 | 58.0 | 551 | 230 | 469 | 610 | 56.1 | 
| Osteolaemus tetraspis | 39.9 | 60.1 | 495 | 231 | 506 | 589 | 70.0 | 
| Paleosuchus palpebrosus | 46.1 | 53.9 | 638 | 194 | 390 | 584 | 24.1 | 
| Paleosuchus trigonatus | 47.2 | 52.8 | 655 | 198 | 375 | 581 | 30.9 | 
| Tomistoma schlegelii | 43.1 | 56.9 | 540 | 253 | 493 | 553 | 24.7 |