Seawitch

A photo of the Seawitch backglass as described in the post

Once again the universe tries to convince me being a witch is the way to go. Seawitch by Stern, 1980.

Two women in skimpy bikinis made of way too much gold ride barracuda-like sea monsters. One carries a bow and the other a pike. A giant human skull cave is in the top right. An assortment of mermaids and skulls adorn the left.