Felt I had to pass along this video, taken from what looks a lot like a Response Boat, Small. The accompanying narrative,

“An Israeli Navy patrol eliminates Hamas terrorists whose boat has been destroyed in this footage from the October 7 attacks. Soldiers from the Snapir harbour security unit throw grenades and open fire at Hamas fighters as they swim towards Zikim beach. Dvora class patrol boats had destroyed the terrorists’ inflatable boats. Several Hamas fighters made it to shore at Zikim and attacked a military training base and a Kibbutz. More than 1,000 Israelis died in the attacks.”

I would point out that following the Battle of the Bismarck Sea in March 1943, when US Army Air Corps and Allied aircraft sank eight loaded Japanese transports and four of their escorting destroyers, US Navy PT boats had a similar unpleasant task, killing the survivors in the water, rafts, and lifeboats so that they could not make it to Lae, a nearby island and their original intended destination, and continue the fight.

During the Vietnam War concussion grenades were also commonly used against combat swimmers.

There was also this video, apparently taken through the sighting system of a Remote Weapon Station, probably very similar to the Mk38 Mod2/3. This seems to be related to the incident in the video above.

The accompanying Narrative,

“On July 8, five Hamas terrorists infiltrated Israel from the sea near Zikim in order to carry out an attack. The IDF neutralized the terrorists through a combined effort of the ground, air and naval forces. This footage shows the Israel Navy targeting one of the terrorists on the beach.”