Could this be a large, light-colored marine animal, which could be a shark or another large marine mammal, such as a manatee or possibly a dolphin, or perhaps something totally different altogether?
Participating in Six Word Saturday
Now, Let your imagination run wild
Ritva Sillanmäki Photography 
Tantalising.
Did you guess it was a Boat propeller / Boat prop
I certainly did not! What I know about boats could be written on a very small postage stamp.
This is such a fun and intriguing piece—you’ve captured a real sense of curiosity in just a few lines. The open-ended questioning pulls the reader right in, making us pause and imagine what it could be, almost like we’re there with you, trying to make sense of the sight.
Did you guess it was a Boat propeller / Boat prop
I can see it now… once you know, it clicks instantly. Those shapes can be surprisingly tricky to guess at first, but it makes total sense.
I can’t even wrap my imagination around this image to make a giess!
So ou did not guess that this was a Boat propeller / Boat prop
Not even close!
It looks like a diver holding something.
aah, so your choice was not a Boat propeller / Boat prop 😂