| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 44.1 | 55.9 | 366 | 145 | 315 | 333 | 73.1 | 
| Alligator sinensis | 47.3 | 52.7 | 380 | 158 | 291 | 309 | 60.7 | 
| Caiman crocodilus | 45.1 | 54.9 | 393 | 126 | 290 | 341 | 24.1 | 
| Crocodylus acutus | 44.0 | 56.0 | 357 | 156 | 299 | 353 | 32.9 | 
| Crocodylus intermedius | 43.9 | 56.1 | 358 | 153 | 298 | 356 | 21.8 | 
| Crocodylus moreletii | 44.4 | 55.6 | 358 | 155 | 299 | 344 | 25.4 | 
| Crocodylus niloticus | 46.0 | 54.0 | 362 | 170 | 293 | 331 | 43.8 | 
| Crocodylus novaeguineae | 45.6 | 54.4 | 371 | 160 | 294 | 340 | 24.6 | 
| Crocodylus palustris | 45.3 | 54.7 | 367 | 157 | 293 | 339 | 31.5 | 
| Crocodylus porosus | 45.4 | 54.6 | 368 | 157 | 295 | 336 | 41.7 | 
| Crocodylus rhombifer | 44.2 | 55.8 | 355 | 160 | 306 | 344 | 38.2 | 
| Crocodylus siamensis | 45.2 | 54.8 | 360 | 162 | 301 | 333 | 21.9 | 
| Gavialis gangeticus | 43.8 | 56.2 | 362 | 143 | 307 | 341 | 28.8 | 
| Mecistops cataphractus | 43.7 | 56.3 | 363 | 146 | 290 | 367 | 56.1 | 
| Osteolaemus tetraspis | 42.5 | 57.5 | 346 | 145 | 300 | 365 | 70.0 | 
| Paleosuchus palpebrosus | 50.2 | 49.8 | 418 | 153 | 267 | 299 | 24.1 | 
| Paleosuchus trigonatus | 50.5 | 49.5 | 422 | 155 | 266 | 300 | 30.9 | 
| Tomistoma schlegelii | 44.3 | 55.7 | 376 | 140 | 308 | 341 | 24.7 |