Personalized Mermaid Tail 1st Birthday Baby Bodysuit. Cute 1st birthday Baby Bodysuit - Heather and Hot Pink with splashing mermaid tail, seashells and starfish says This Mermaid Is One. Our unisex one piece baby bodysuit make great gift for newborns, babies, infants, baby showers and expectant moms. An ideal gift for any new parent who will want one in every color.