Toys R Us Wyncote had 3 new fashion dolls under the title "H2O: Just Add Water." These 10" dolls are based on a television show that I have neither seen nor heard about before. There are three characters: two blondes, Rikki and Emma, and brunette Cleo.
They have a separate "mermaid tail" that fits over their human legs.
Here are the Toys R Us links:
They're okay. There are two versions of the each doll - a basic doll and a doll with a fashion.