.
BTW, that bottom is not sandy.
Sand bottoms always have a wavy surface that looks kind of like a washboard, and I didn’t see any of that. There’s just a little aggregate here and there.
.
not always-
https://www.youtube.com/watch?v=IlDt9gz2x8c
https://www.youtube.com/watch?v=pvzOAnfzR90
You watch the crab show in alaska- the sea floors aren’t always washboard either- There is evidence that there are massive deposited of sand which some claim created ‘land bridges’ over which the Israelites could have crossed- and the following site states that the sea floor is made of muddy sludge created from the eroding surrounding mountains on the sides of the sea:
The videos looked like sand to me-