| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 43.5 | 56.5 | 214 | 85 | 170 | 219 | 73.1 | 
| Alligator sinensis | 46.8 | 53.2 | 221 | 101 | 170 | 196 | 60.7 | 
| Caiman crocodilus | 42.6 | 57.4 | 215 | 78 | 172 | 223 | 24.1 | 
| Crocodylus acutus | 41.8 | 58.2 | 191 | 95 | 169 | 229 | 32.9 | 
| Crocodylus intermedius | 41.7 | 58.3 | 190 | 95 | 170 | 229 | 21.8 | 
| Crocodylus moreletii | 41.7 | 58.3 | 191 | 94 | 168 | 231 | 25.4 | 
| Crocodylus niloticus | 42.0 | 58.0 | 195 | 92 | 165 | 232 | 43.8 | 
| Crocodylus novaeguineae | 41.1 | 58.9 | 187 | 94 | 172 | 231 | 24.6 | 
| Crocodylus palustris | 43.0 | 57.0 | 200 | 94 | 161 | 229 | 31.5 | 
| Crocodylus porosus | 41.2 | 58.8 | 188 | 94 | 171 | 231 | 41.7 | 
| Crocodylus rhombifer | 40.8 | 59.2 | 185 | 94 | 173 | 232 | 38.2 | 
| Crocodylus siamensis | 41.1 | 58.9 | 187 | 94 | 172 | 231 | 21.9 | 
| Gavialis gangeticus | 42.0 | 58.0 | 192 | 97 | 170 | 229 | 28.8 | 
| Mecistops cataphractus | 41.7 | 58.3 | 195 | 90 | 168 | 231 | 56.1 | 
| Osteolaemus tetraspis | 41.1 | 58.9 | 187 | 94 | 178 | 225 | 70.0 | 
| Paleosuchus palpebrosus | 46.7 | 53.3 | 232 | 89 | 152 | 215 | 24.1 | 
| Paleosuchus trigonatus | 46.5 | 53.5 | 233 | 87 | 151 | 217 | 30.9 | 
| Tomistoma schlegelii | 41.6 | 58.4 | 184 | 102 | 177 | 225 | 24.7 |