Merla is a character in Dorothy and the Wizard of Oz, in the episode "The Emerald of Zog".
Merla first appeared rescuing Dorothy, Lion, Scarecrow, Tin-Man and Toto from her arch-nemesis, Zog, who wanted the Sea Emerald for himself. When she rescued Dorothy and her friends, she ended up captured by Zog. But Dorothy tricked Zog into chasing after her, while Scarecrow, Tin Man, Lion and Toto rescue Merla. Luckily, Dorothy and her friends used a fake sea emerald to fool Zog, while they keep the real Sea Emerald to prevent the Jewel Mule from attacking Emerald City. After Dorothy thanked Merla for her help, she dives right back into the water.