
How did the guppy cross the ocean?: An unexpected fish appears on a volcanic archipelago. To the surprise of the scientists, populations of a South American guppy were spotted at the Fernando de Noronha archipelago, a volcanic island in the South Atlantic. Even if being easily adaptable fishes, it was unclear how a small freshwater species had managed to cross the ocean and populate the archipelago. Researchers suggest that the US military in WWII may be behind the phenomenon. Source 5o.