Well I remember a US movie of the 1970's with George, C. Scott: https://en.wikipedia.org/wiki/The_Day_of_the_Dolphin https://en.wikipedia.org/wiki/The_Day_of_t

Well I remember a US movie of the 1970's with George, C. Scott: https://en.wikipedia.org/wiki/The_Day_of_the_Dolphin https://en.wikipedia.org/wiki/The_Day_of_the_Dolphin though admittedly in the fiction the dolphins were trained to place the explosives and leave. About the supposed use of dolphins in Sevastopol: https://www.livescience.com/russians-using-military-dolphins-satellite https://www.livescience.com/russians-using-military-dolphins... they seem like a marine version of the good ol' Roman geese: https://en.wikipedia.org/wiki/Brennus_(leader_of_the_Senones) https://en.wikipedia.org/wiki/Brennus_(leader_of_the_Senones... a sort of intrusion alarm.