Queen Marina, full of excitement, began to narrate the legend of their lost sister, Coralina. She was a mermaid with a rare crystalline pinkish purple tail adorned with golden scales who mysteriously vanished into the human world!

The young mermaids were astounded. One of them inquired if mermaids could really venture to the human world. Queen Marina confirmed, warning them of its dangers, but expressing her belief that they would find Coralina one day.

Coralina, fascinated by the human world, sang a song as she explored. She encountered a group of children playing on the beach. They were amazed by her tail and welcomed her warmly, seeing her as a treasure.

The children were eager to share their seashell collections with Coralina, asking if she had seen any treasures washed ashore. Coralina laughed and entertained them with her magical song, further captivating her little audience.

The mermaids of Atlantis were restless, eager to find their lost sister. A young mermaid mentioned whispers of a pinkish purple tail spotted near the human shores. Could it be Coralina? They had to find out.

Queen Marina, filled with hope, rallied the young mermaids. They had to journey to the human world and bring Coralina home. Guided by their deep connection to Coralina, they swam towards the human world.

Coralina was amidst her joyful interactions with the children when she felt a familiar presence. Her sisters were near! Overwhelmed with excitement, she prepared to meet them.

The young mermaids from Atlantis appeared, led by Queen Marina. They were overjoyed to see Coralina. Queen Marina was especially relieved and expressed how they had been searching everywhere for her.

Coralina was happy to see her family but also shared her fascination with the human world. Queen Marina smiled understandingly and reassured Coralina that Atlantis was her home, and she was their treasure.

Coralina, moved by Queen Marina's words, felt a sense of gratitude. She was ready to return home but promised to share her human world adventures with her Atlantis family. A new chapter awaited Coralina in Atlantis.

As she prepared to leave, she bid farewell to the children. She thanked them for their kindness and the wonderful time. The children promised to remember Coralina and her magical songs.

With final goodbyes said and memories treasured, Coralina, followed by Queen Marina and the young mermaids, disappeared into the waves, heading towards their underwater kingdom, Atlantis. The adventure of the lost mermaid of Atlantis came to a heartwarming close.