Urchin Shoals

Urchin Shoals, or Sparkling Waters-4, is the fourth course of Sparkling Waters in New Super Mario Bros. U. It is unlocked via completion of Haunted Shipwreck, and its own completion unlocks Dragoneel's Undersea Grotto.

Layout
Like Waterspout Beach and Above the Cheep Cheep Seas before it, this course contains Water Spouts, only this time, most of them have Urchins and Big Urchins on top of them.

Star Coins

 * Star Coin 1: Underneath an orange bridge, Mini Mario is required to reach it.
 * Star Coin 2: Immediately after the first Star Coin is a Water Spout that reaches up to the Warp Pipe that leads to the area with the second Star Coin. Like before, Mini Mario is required to reach it.
 * Star Coin 3: Below an orange bridge is a series of Urchins and Water Spouts that creates a path to the Warp Pipe that leads to the area with the third Star Coin.

Enemies

 * Urchins
 * Big Urchins
 * Koopa Troopas
 * Goombas