| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 48.1 | 51.9 | 265 | 204 | 190 | 317 | 73.1 |
| Alligator sinensis | 49.2 | 50.8 | 278 | 207 | 177 | 323 | 60.7 |
| Caiman crocodilus | 48.7 | 51.3 | 271 | 210 | 190 | 317 | 24.1 |
| Crocodylus acutus | 47.3 | 52.7 | 258 | 207 | 197 | 322 | 32.9 |
| Crocodylus intermedius | 47.2 | 52.8 | 257 | 207 | 198 | 322 | 21.8 |
| Crocodylus moreletii | 47.6 | 52.3 | 258 | 212 | 196 | 320 | 25.4 |
| Crocodylus niloticus | 47.0 | 53.0 | 254 | 208 | 201 | 321 | 43.8 |
| Crocodylus novaeguineae | 48.0 | 52.0 | 260 | 212 | 192 | 319 | 24.6 |
| Crocodylus palustris | 47.7 | 52.3 | 261 | 208 | 195 | 320 | 31.5 |
| Crocodylus porosus | 47.7 | 52.3 | 264 | 205 | 196 | 319 | 41.7 |
| Crocodylus rhombifer | 47.4 | 52.6 | 260 | 206 | 195 | 323 | 38.2 |
| Crocodylus siamensis | 47.8 | 52.2 | 268 | 203 | 190 | 324 | 21.9 |
| Gavialis gangeticus | 45.6 | 54.4 | 250 | 201 | 214 | 325 | 28.8 |
| Mecistops cataphractus | 46.0 | 54.0 | 255 | 199 | 205 | 327 | 56.1 |
| Osteolaemus tetraspis | 45.4 | 54.6 | 249 | 196 | 214 | 322 | 70.0 |
| Paleosuchus palpebrosus | 49.2 | 50.8 | 140 | 107 | 93 | 162 | 24.1 |
| Paleosuchus trigonatus | 46.7 | 53.3 | 271 | 187 | 186 | 336 | 30.9 |
| Tomistoma schlegelii | 46.8 | 53.2 | 140 | 116 | 117 | 174 | 24.7 |