Military Dolphins

Nation(s) Involved: Iran and Russia
Time Period: 1980s to 2000
We all know the way things are done in Iran can be quite different compared to what goes down in the West. However, we’re not even sure most of Iran’s neighboring states would understand this one. Back in 2000, it was uncovered that Iran purchased an entire fleet of military-trained dolphins from Russia. During the reign of the Soviet Union decades ago, they trained several dolphins to kill potential enemies and attack enemy ships. While Iran buying these dolphins is weird enough, there are MANY questions we have for Russia on this one.
Were they trained dolphins that just did not die off from the Soviet Union days? Were these dolphins still active and in military training before they were sold off? Moreover, where the heck is Iran going to utilize our mammalian friends? They are close to a major body of water but it is not like they get a lot of enemies coming at them in that direction. Plus, how do you keep these dolphins from going rusty during lul periods? There are just so many things odd with this. What’s weirder? The U.S. had some too. Seriously, the militaries around this world do some weird stuff.