| Name of Animal (if any) | Body of Water | Country |
Description | Date(s) |
| Chan (Aztec name for water god) | La Alberca lake | Valle de Santiago, in Guanajuato state, Mexico | Long-necked serpent. Possible photo on 6 Sept 1958. Related webpage |
Aztecs to present |
| Nahuelito | Nahuel Huapi Lake | Argentina | Nessie-type | Pre-Columbian-1910 |
| Pacific Ocean | offshore of Chile | Apr 1905 | ||
| "Cuero" (cowhide) or "El Bien Peinado" (the smooth-headed one") | Lago Lacar | National Park of Lanin in southern Andes Mtns | ||
| Straits of Magellan | Argentina | Sea serpent, about 30' long | 1906 | |
| River Tamango | near Chile/Argentina border | Carcass and tracks found | 1902 | |
| lake in Santa Cruz Territory, Patagonia | Argentina | 1913 | ||
| unnamed lake | Andean foothill of Chebut Territory, Patagonia, Argentina. | "Plesiosaur." Several expeditions failed to produce conclusive evidence | 1897, 1907, 1924, 1922 | |
| South Atlantic Ocean | offshore of Brazil near Para�ba | Neck 8-9' long.. Observed by two members of the London Zoological Society | 1907 |