Silver Age Aquaman
I took a Jack O' Lantern torso, Dread Knight Arms, Gladiator legs, and added a Johnny Storm head. I joined the four parts by super gluing the torso back together.
I used scrap plastic to create Arthur's buckle.
There are fins on the backs of his calves, which were added using plumber's putty. (Not visible in the photo.)
The figure was then primed, painted, and sealed.