Here is what I see: the head clearly upright and visible I have been convinced now is mr. Yamamoto.
The orange circle is Fuddy's head, barely visible behind her yellow inflatable flotation device, clearly NOT upright but lying back. You can only see a tiny portion of her forehead in these, but in one of the others, her eyebrows are visible.
Joe's red circle was the part that people think was a diver. It looks more like a mini Morton salt man if anything, but broken down, I see:
Inside the green circle, clearly a foot. I originally thought a patterned sock, but the sneaker in the above post looks like it has a very "soft looking" yet strange sole that kind of resembles this. So I am thinking a shoe. A light color with dark center. An unusual thing is the tightness of the black or dark pants at the foot. Can anyone explain that? Not the ballooning with air, the tightness (wrinkles like a balloon's close).
The white circle is a part of the body in black or very dark wet clothing. Since Fuddy was wearing fairly long (though cropped) black pants, perhaps this is her knee or other lower body areas.