The teen mermaids, humans and Cleo, Emma, Bella, and Rikki have all gotten done with school. they are now grown up, married, and have kids who are now teens. The Mako Mermaid Pod now allows mermaids and mermen to marry each other. The mermaids are also allowed to marry humans as long as they visit. The children of the mermaids and humans go to school and fall in love. Erik has changed his ways and is married to Ondina.