Russia appears to have doubled the number of trained dolphins defending its Black Sea fleet.
The dolphins at the naval base in Sevastopol are trained to detect Ukrainian special forces divers.
Satellite imagery at the time captured by Maxar Technologies shows two pens containing the trained dolphins.
This comes after several drone attacks targeting Russia's ships in the area, as Ukrainian forces launched their recent counteroffensive in the long-running conflict.
The Black Sea peninsula was invaded by Russian forces and illegally annexed by Putin in 2014.
Persons:
—, Sutton, Renee C, Aiello
Organizations:
Black, Service, Russian, Naval News, Russian Navy, Maxar Technologies, Ukrainian, Dolphins, US Naval Institute ., US Navy Marine Mammal, Corpus Christi, US Coast Guard, RIA Novosti, US Navy, Naval Times
Locations:
Russia, Sevastopol, Crimean, Crimea, Russian, Sutton, Corpus, Sweden, Israel, North Korea