http://www.newsweek.com/why-does-russia-have-dolphin-army-does-u-s-have-one-1701668

Satellite images suggest that Russia has deployed an army of dolphins to protect their naval base in the Black Sea.

According to the US Naval Institute (USNI), Russia placed two dolphin pens at the entrance to the Sevastopol Harbor naval base in February, around the point they invaded Ukraine on February 24. But why?