| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 43.2 | 56.8 | 414 | 273 | 379 | 523 | 73.1 | 
| Alligator sinensis | 44.8 | 55.2 | 691 | 404 | 612 | 736 | 60.7 | 
| Caiman crocodilus | 44.0 | 56.0 | 417 | 270 | 367 | 507 | 24.1 | 
| Crocodylus acutus | 42.5 | 57.5 | 380 | 276 | 397 | 492 | 32.9 | 
| Crocodylus intermedius | 42.7 | 57.3 | 380 | 279 | 396 | 490 | 21.8 | 
| Crocodylus moreletii | 43.0 | 56.9 | 384 | 281 | 392 | 488 | 25.4 | 
| Crocodylus niloticus | 42.8 | 57.2 | 382 | 282 | 395 | 491 | 43.8 | 
| Crocodylus novaeguineae | 43.2 | 56.8 | 388 | 280 | 390 | 487 | 24.6 | 
| Crocodylus palustris | 43.3 | 56.7 | 384 | 283 | 390 | 483 | 31.5 | 
| Crocodylus porosus | 43.7 | 56.3 | 3134 | 1685 | 2782 | 3423 | 41.7 | 
| Crocodylus rhombifer | 42.8 | 57.2 | 382 | 279 | 395 | 487 | 38.2 | 
| Crocodylus siamensis | 43.0 | 57.0 | 387 | 277 | 396 | 483 | 21.9 | 
| Gavialis gangeticus | 42.7 | 57.3 | 383 | 276 | 384 | 501 | 28.8 | 
| Mecistops cataphractus | 42.9 | 57.1 | 394 | 271 | 390 | 495 | 56.1 | 
| Osteolaemus tetraspis | 42.6 | 57.4 | 376 | 275 | 394 | 482 | 70.0 | 
| Paleosuchus palpebrosus | 45.4 | 54.6 | 381 | 231 | 298 | 439 | 24.1 | 
| Paleosuchus trigonatus | 43.9 | 56.1 | 423 | 259 | 353 | 517 | 30.9 | 
| Tomistoma schlegelii | 43.3 | 56.7 | 388 | 280 | 378 | 495 | 24.7 |