The green tint of the water makes me think of ethylene glycol auto coolant... :)

To a degree, it seems to resemble the debris from a shipwreck. The lighting seems rather superb, just enough to highlight the area.

Looks inviting to a degree. Suppose it "frames" the shot, heh.

Thanks for sharing more photos! Wonderful as always, Motts!

Wow, where's "This Old House" when you need them, huh? :)