Probably not photoshopped.
In the event of a marine catastrophe of this magnitude, the authorities would have had to send down divers to check for bodies, and to ID and locate the boats for immediate removal (hazards to navigation, toxic fuel leakage, insurance evidence, billing for clean-up costs, etc).
Dumbkirk, eh? Pod, that is priceless! I have to admit I spent half the night trying to come up with a suitable term for this fiasco, one that would ring through the end of time. You got it.
This is right up there with Salamis, Tsushima, Trafalgar, Pearl Harbor, Midway, the Spanish Armada and other great defeats at sea of history.
And the picture is the counter to the inevitable claim down the line that it was all an MSM fake news hoax.