Z Space has been mightily transformed for “Selkie,” Sarah Shaefer’s tale of a mythical creature that is a seal in the ocean, but having shed its skin, becomes a human being on shore. The play, ...

Mermaids are the most celebrated mythical creatures of the sea — they get fairy tales, musicals and rides at theme parks devoted to their lore. But it seems that selkies, a lesser-known mythical sea ...