| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 44.2 | 55.8 | 183 | 45 | 78 | 210 | 73.1 |
| Alligator sinensis | 46.1 | 53.9 | 183 | 55 | 82 | 196 | 60.7 |
| Caiman crocodilus | 46.0 | 54.0 | 206 | 34 | 58 | 224 | 24.1 |
| Crocodylus acutus | 43.9 | 56.1 | 180 | 52 | 82 | 214 | 32.9 |
| Crocodylus intermedius | 44.5 | 55.5 | 180 | 55 | 82 | 211 | 21.8 |
| Crocodylus moreletii | 45.5 | 54.5 | 180 | 60 | 84 | 204 | 25.4 |
| Crocodylus niloticus | 44.3 | 55.7 | 178 | 56 | 85 | 209 | 43.8 |
| Crocodylus novaeguineae | 44.4 | 55.6 | 182 | 51 | 82 | 210 | 24.6 |
| Crocodylus palustris | 44.9 | 55.1 | 176 | 61 | 87 | 204 | 31.5 |
| Crocodylus porosus | 43.8 | 56.3 | 181 | 50 | 85 | 212 | 41.7 |
| Crocodylus rhombifer | 43.9 | 56.1 | 174 | 58 | 88 | 208 | 38.2 |
| Crocodylus siamensis | 43.2 | 56.8 | 183 | 45 | 83 | 217 | 21.9 |
| Gavialis gangeticus | 43.9 | 56.1 | 181 | 51 | 91 | 205 | 28.8 |
| Mecistops cataphractus | 43.0 | 57.0 | 176 | 51 | 84 | 217 | 56.1 |
| Osteolaemus tetraspis | 43.0 | 57.0 | 170 | 57 | 100 | 201 | 70.0 |
| Paleosuchus palpebrosus | 50.2 | 49.8 | 216 | 46 | 49 | 211 | 24.1 |
| Paleosuchus trigonatus | 50.2 | 49.8 | 218 | 44 | 51 | 209 | 30.9 |
| Tomistoma schlegelii | 44.9 | 55.1 | 174 | 63 | 105 | 186 | 24.7 |