| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 44.6 | 55.4 | 91 | 40 | 85 | 78 | 73.1 |
| Alligator sinensis | 44.8 | 55.2 | 95 | 38 | 81 | 83 | 60.7 |
| Caiman crocodilus | 45.9 | 54.1 | 108 | 27 | 77 | 82 | 24.1 |
| Crocodylus acutus | 44.2 | 55.8 | 95 | 35 | 87 | 77 | 32.9 |
| Crocodylus intermedius | 44.6 | 55.4 | 96 | 35 | 86 | 77 | 21.8 |
| Crocodylus moreletii | 44.9 | 55.1 | 96 | 36 | 86 | 76 | 25.4 |
| Crocodylus niloticus | 45.2 | 54.8 | 96 | 37 | 84 | 77 | 43.8 |
| Crocodylus novaeguineae | 47.3 | 52.7 | 103 | 36 | 80 | 75 | 24.6 |
| Crocodylus palustris | 45.2 | 54.8 | 99 | 34 | 84 | 77 | 31.5 |
| Crocodylus porosus | 44.9 | 55.1 | 95 | 37 | 89 | 73 | 41.7 |
| Crocodylus rhombifer | 44.2 | 55.8 | 96 | 34 | 87 | 77 | 38.2 |
| Crocodylus siamensis | 44.9 | 55.1 | 97 | 35 | 86 | 76 | 21.9 |
| Gavialis gangeticus | 46.1 | 53.9 | 104 | 33 | 86 | 74 | 28.8 |
| Mecistops cataphractus | 41.2 | 58.8 | 87 | 34 | 93 | 80 | 56.1 |
| Osteolaemus tetraspis | 41.5 | 58.5 | 90 | 32 | 99 | 73 | 70.0 |
| Paleosuchus palpebrosus | 50.3 | 49.7 | 119 | 29 | 75 | 71 | 24.1 |
| Paleosuchus trigonatus | 50.7 | 49.3 | 118 | 31 | 79 | 66 | 30.9 |
| Tomistoma schlegelii | 38.8 | 61.2 | 87 | 27 | 100 | 80 | 24.7 |