It lives in tropical oceans, not tannenbaums, embedding itself in coral reefs and growing bizarre, colorful structures that sort of resemble a Whoville Christmas tree — hence the name.

The set features mountains covered in snow, several doors to Whoville houses, a giant Christmas tree that rotates and lights up. “Grinchmas” opens with the Whos decorating Whoville.

A Stroll and Tree Lighting is planned from 1 to 5 p.m. Saturday, Dec. 14, along Norridgewock’s Main Street. • Skowhegan Whoville is scheduled for Dec. 6 and 7 in Skowhegan. The annual parade ...