Let’s see if I have this straight: in an animated tribe of penguins who talk and sing like inner-city residents, Mumble (voiced by Elijah Wood) can’t sing but can tap-dance like crazy. When the tribe starts ailing due to lack of fish, he follows the aliens netting the fish all the way to the city, where he discovers that his dancing just might persuade them to stop overfishing. This curious ecological parable was directed by George Miller (Babe: Pig in the City), who still has an eye and a sense of humor but on this particular outing can’t get the script he wrote with three others to make much sense. Other voices include those of Hugh Jackman, Robin Williams, Nicole Kidman, and Brittany Murphy. PG, 98 min.