Whenever Emerald misses her sister fish, she just thinks of her silently. However, there came a point when her longing became too intense that she called, "Boomshikalaka, boomshikalaka, boomshikalaka..."
A water bubble popped out of the aquarium and her sister fish appeared. They greeted each other and happily chatted for a while. Their happiness was brought to a halt because Poseidon got her sister fish back again and said, "You chose to be human, but the sea and ocean call you. You missed your sister fish, didn't you? Come back with me and enjoy swimming all day and night. Don't you miss your mermaid tail?"
"How about my family?" Emerald asked. "I am your family. You belong to the water. You will come back," Poseidon said smugly and with a thud, he left with Emerald's sister fish.