What else would it be?

As Elaina was finished with her bath last night, she wanted some extra time to play in the tub with her dissolving colored tablets which effectively turn the water either blue, red or yellow. Eric had cautioned her not to make a mess while he stepped out of the room briefly. When he returned just a minute later, he walked into Elaina laying on her back in the bath water, splashing both legs.

Eric sternly asked, " Elaina, what did I tell you about not splashing?"

To which Elaina quickly answered in earnest, "No, it's okay Dad. It's just my tail."

Apparently she is part mermaid. Must have slipped my mind.