And normally, I know that if we'd even been thinking of that happening, we would have had boats and frogmen and all kinds of safety measures, which we didn't have.

Source: https://www.buzzfeed.com/hannahmarder/method-actors-who-nearly-got-themselves-killed

'It might be a "bluff" to unnerve enemy frogmen, but it looks like a strong possibility they are indeed using dolphins, essentially as "sentries" I would guess.'

Source: https://www.dailymail.co.uk/news/article-12135535/Russian-spy-whale-look-secret-agent-animals-including-hero-pigeon-CIA-cat.html?ns_mchannel=rss&ns_campaign=1490&ito=1490