Denmark
USA
A portion of the tail of a prehistoric reptile is discovered in Denmark. It regenerates into the entire reptile, which proceeds to destroy buildings and property and generally make a nuisance of itself. It can fly, swim, and walk, and has impenetrable scales, which makes it difficult to kill. - IMDb
| Apeili stin poli |  Greece |
| Enantion olon ton ethnon (transliterated title) | Greece |
| Monstruo invencible: Reptilicus |  Argentina |
| O deinosavros ekdikeitai (reissue title) | Greece |
| Primitive Beast Reptilicus |  Japan |
| Reptilicus |  Australia |
| Reptilicus |  Brazil |
| Reptilicus |  Canada |
| Reptilicus |  West Germany |
| Reptilicus | Denmark |
| Reptilicus |  United Kingdom |
| Reptilicus |  Mexico |
| Reptilicus | USA |
| Reptilicus - Il mostro distruggitore |  Italy |
| Reptilicus - Terror em Copenhaga |  Portugal |
| Reptilicus le monstre des mers |  France |
| Reptilicus: Le Monstre des Mers | Canada |
| Slaughter of the Frozen Evil Primitive Beast Reptilicus | Japan |
| Рептиликус |  Soviet Union |
| 冷凍凶獣の惨殺 | Japan |
| 原始獣レプティリカス | Japan |
| 原始獣レプティリカス 冷凍凶獣の惨殺 | Japan |
