| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 43.5 | 56.5 | 229 | 66 | 179 | 204 | 73.1 | 
| Alligator sinensis | 45.2 | 54.8 | 225 | 84 | 184 | 191 | 60.7 | 
| Caiman crocodilus | 43.6 | 56.4 | 246 | 52 | 164 | 222 | 24.1 | 
| Crocodylus acutus | 42.8 | 57.2 | 216 | 82 | 175 | 223 | 32.9 | 
| Crocodylus intermedius | 42.7 | 57.3 | 214 | 83 | 176 | 223 | 21.8 | 
| Crocodylus moreletii | 43.8 | 56.2 | 218 | 87 | 173 | 218 | 25.4 | 
| Crocodylus niloticus | 43.7 | 56.3 | 215 | 84 | 170 | 215 | 43.8 | 
| Crocodylus novaeguineae | 42.8 | 57.2 | 213 | 85 | 173 | 225 | 24.6 | 
| Crocodylus palustris | 43.1 | 56.9 | 211 | 84 | 169 | 220 | 31.5 | 
| Crocodylus porosus | 42.8 | 57.2 | 216 | 77 | 168 | 223 | 41.7 | 
| Crocodylus rhombifer | 44.4 | 55.6 | 213 | 96 | 177 | 210 | 38.2 | 
| Crocodylus siamensis | 43.0 | 57.0 | 219 | 80 | 172 | 225 | 21.9 | 
| Gavialis gangeticus | 39.4 | 60.6 | 202 | 72 | 190 | 231 | 28.8 | 
| Mecistops cataphractus | 39.9 | 60.1 | 210 | 68 | 180 | 238 | 56.1 | 
| Osteolaemus tetraspis | 39.6 | 60.4 | 196 | 75 | 190 | 223 | 70.0 | 
| Paleosuchus palpebrosus | 45.2 | 54.8 | 249 | 60 | 153 | 222 | 24.1 | 
| Paleosuchus trigonatus | 47.4 | 52.6 | 263 | 61 | 142 | 218 | 30.9 | 
| Tomistoma schlegelii | 38.5 | 61.5 | 193 | 75 | 201 | 227 | 24.7 |