Watch Barbie in a Mermaid Tale (2010) HD Full Movie Free on SolarMovie. Watch Barbie in a Mermaid Tale (2010) online free. Barbie stars as Merliah, a surfer who learns a shocking secret: she's a mermaid! She and her dolphin...Barbie stars as Merliah, a surfer who learns a shocking secret: she's a mermaid! She and her dolphin friend set out for an undersea adventure to rescue her mother, the queen of Oceana.