The British military has reported that Russia is training combat dolphins in the annexed Crimean peninsula to counter Ukrainian forces, investing heavily in security at the Black Sea Fleet's main base at Sevastopol. Imagery shows a near doubling of floating mammal pens in the harbor which likely contain bottle-nosed dolphins, and the animals are "highly likely intended to counter enemy divers." It is unclear how effective the dolphins will be, but it is clear that Russia is investing heavily in its defences.