When you are alone, especially for long periods of time, do you talk to yourself? If so, you’re in interesting company because a male Atlantic bottlenose dolphin who has been living alone in the Baltic Sea for more than three years, appears to be talking to himself.

Discover Delle, a lone bottlenose dolphin in the Baltic Sea, whose unique vocalizations captivate scientists and locals.

What happens when a highly social creature like a bottlenose dolphin is left utterly alone? Delle, a solitary dolphin in Denmark, may be showing us.

Marine biologists are perplexed by the lone bottlenose dolphin's vocalizations, because some resemble sounds typically used for communication