Ancient Crocs Sailed 3,000km Indian Ocean

Saltwater crocodiles, known for their immense size and predatory prowess, have been revealed as astonishing long-distance ocean travelers. A new genetic study, combining modern DNA with ancient museum skulls, confirms that crocodiles historically found along the Seychelles coast were indeed this species, not a unique one.

Researchers found that these crocodiles possess specialized salt glands enabling them to tolerate seawater for extended periods. This adaptation allowed them to colonize remote islands, with evidence suggesting the founders of the Seychelles population journeyed at least 3,000 kilometers across the Indian Ocean to reach the archipelago. Historically, these creatures spanned coasts over 12,000 kilometers apart.

The genetic findings resolve a long-standing mystery, showing these ancient Seychelles crocodiles were part of the westernmost group of saltwater crocodiles. While humans caused their extinction in these regions, DNA analysis has brought their remarkable migratory history to light, underscoring the species' global reach and adaptability.