It's a school of fish! I'm not sure what kind of fish(?)but all kinds from the look of it. I simply 'picked out' the shapes I saw. I see even more now that I look at this on screen. Can you see the other fish?
Here I've expanded on my original landscape and tweaked some areas.
I'm still playing with the negative painting. It's also fascinating to look at random shifts in color and value on a piece of paper and pick out shapes. That's something I've never tried before but always wanted to attempt. It seems these two approaches go well together. The other obvious lesson one can glean from negative painting is the use of values and color to create depth. The darker or cooler the color the more it recedes. The brighter or warmer the color the more it moves forward.