The military has opened the bidding on a 1.75 million ruble contract to deliver dolphins to the military in the Crimean port city of Sevastopol by August 1, according to a document uploaded today to the government's procurement website.
According to public contract documentation, it is seeking two female and three male dolphins between three and five years old with perfect teeth and no physical impairments.
An unnamed source told RIA Novosti state news agency in March 2014 that new training programmes were being designed to make the dolphins serve Russia's military interests.
Retired colonel Viktor Baranets, who observed military dolphin training in the Soviet and post-Soviet eras, said that the sea mammals were part of the broader Cold War arms race between the USSR and the United States.
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"Americans looked into this first," Baranets told AFP. "But when Soviet intelligence found out the tasks the US dolphins were completing in the 1960s, the defence ministry at the time decided to address this issue."
Crimea, which Russia annexed from Ukraine in March 2014 amid international indignation, has housed this training facility since 1965.
The training centre was severely neglected after the collapse of the Soviet Union, Baranets said, and its dolphins were reportedly sold to Iran.
The Ukrainian navy reestablished the centre in 2012 but Russia's landgrab two years later saw Crimea's combat dolphins fall under Moscow's control.
The defence ministry could not be reached for comment today.