From a sheet off one of my palette pads. I use those gray paper palettes a lot as they are a fine surface for mixing acrylics and the gray surface better enables me to judge relative values of colors I'm blending.
The different subjects aren't meant to tell a story or look connected in any way. They're just sketches riffing on smudges of mixed paint.
It could be the one on the top right was influenced by seeing JAWS on cable channels virtually all summer long. It’s a perennial summer favorite apparently!
When I swiped a blending brush on the paper it made a shape that said “Land shark!” to me, for some reason. This one is rather Bosch-y, though, having feathery bits and legs and all.