I was a ships diver in the navy a long time ago. Diving under the hull of Ark Royal at anchor off the coast of Italy. Checking out the propellors in a soupy sea of mush, about 2m vis… I saw a dark shape flit by, we’d seen sharks about, so popped myself.
But then I heard it, the unmistakble chick and whistle of a dolphin.
Never saw it close by, but for the next 30min the b***er damn near deafened me every 10secs.
Not a spiritual experience, the annoying sod.