'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

Mourners at the funeral were watched over by army sentries placed among the trees as speakers vowed never to forgive or forget the way families like the Itamaris were abandoned.

Source: https://www.theguardian.com/world/2023/oct/29/israelis-vow-never-to-forgive-or-forget-abandonment-by-government-as-war-looms-large