Nick Martiniano, left, and Brandon Jones, right, perform “Under the Sea” in “The Little Mermaid” at Cohoes Music Hall. The stage adaptation of Disney’s 1989 film includes hits from the movie by Alan ...
“The Little Mermaid” has the ingredients for a buoyant musical: Gorgeous costumes, beautiful voices, some solid acting. And yet, it sinks. Blame the script. It lacks pizzazz. It’s heavy with bad puns.