I considered making a stencil or finding a sketch to transfer, but as with most projects, it's just better to wing it ;-) So I freehanded with a pink painter's pen (I love these things!)
Simplicity 5508 (Out-of-print now, I believe, but if I recall correctly there is another newer one with the wrap pants included...) View C (the rest are tops, flip-flops, a floppy hat, a bag -good, complete beachwear pattern) in Blue batik (which I ended up ordering because the ones in the store were too busy or the patterns formed by the dye weren't 'oceany'.
They look better on a person, but since they're not my size, they would not lay right if I modeled them. Initially, I was going to do both legs, but that seemed like it'd be too busy/overkill. So I left it as one leg, but this seemed unbalanced. My friend suggested adding a 'squishy', aka a mini/baby jellyfish. He is on the upper left leg, across from the large lone jellyfish.