Piripenguins Season 1 Episode 3 The Merguin

The Piripenguins fall under the spell of a mythical "Merguin" (a mermaid-penguin), who changes their personalities before leading them to her island from which no penguin has returned. With her friends in a trance, it's up to sensible Looph to prove that the creature is far from magical and bring them back to reality.