The Octonauts Season 1 Episode 13 - The Lost Sea Star Episode Title:The Lost Sea Star.Episode Description:A sea star (starfish) named Twinkle has got lost on the beach, but the Octonauts have to search the sea from top to bottom to find its home, as there are nearly 2000 species of sea star living at all levels of the ocean. On a reef in the Sunlight Zone they encounter a sunflower seastar and a predatory porcupine pufferfish. In the Twilight Zone they encounter brittle stars and get chased into a cave by a wolf eel, where they notice Twinkle glows in the dark, which means it is from the Midnight Zone. They end up crashing the Gup at the bottom of an ocean trench, but luminous sea stars light the way out for them.