| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 44.3 | 55.7 | 669 | 469 | 534 | 894 | 73.1 | 
| Alligator sinensis | 47.0 | 53.0 | 701 | 503 | 513 | 847 | 60.7 | 
| Caiman crocodilus | 45.3 | 54.7 | 685 | 484 | 526 | 885 | 24.1 | 
| Crocodylus acutus | 44.5 | 55.5 | 641 | 507 | 535 | 895 | 32.9 | 
| Crocodylus intermedius | 44.6 | 55.4 | 645 | 505 | 532 | 896 | 21.8 | 
| Crocodylus moreletii | 44.6 | 55.4 | 644 | 507 | 531 | 899 | 25.4 | 
| Crocodylus niloticus | 44.7 | 55.3 | 640 | 511 | 538 | 888 | 43.8 | 
| Crocodylus novaeguineae | 45.2 | 54.8 | 654 | 512 | 516 | 896 | 24.6 | 
| Crocodylus palustris | 44.7 | 55.3 | 654 | 499 | 527 | 897 | 31.5 | 
| Crocodylus porosus | 44.7 | 55.3 | 653 | 499 | 534 | 891 | 41.7 | 
| Crocodylus rhombifer | 44.9 | 55.1 | 649 | 507 | 526 | 895 | 38.2 | 
| Crocodylus siamensis | 44.8 | 55.2 | 657 | 499 | 526 | 900 | 21.9 | 
| Gavialis gangeticus | 44.9 | 55.1 | 665 | 496 | 554 | 869 | 28.8 | 
| Mecistops cataphractus | 44.0 | 56.0 | 641 | 493 | 549 | 893 | 56.1 | 
| Osteolaemus tetraspis | 43.7 | 56.3 | 633 | 492 | 569 | 881 | 70.0 | 
| Paleosuchus palpebrosus | 47.0 | 53.0 | 591 | 390 | 385 | 723 | 24.1 | 
| Paleosuchus trigonatus | 46.1 | 53.9 | 714 | 468 | 484 | 900 | 30.9 | 
| Tomistoma schlegelii | 44.8 | 55.2 | 550 | 415 | 471 | 716 | 24.7 |