Nixie is a mermaid and so is Lyla, and they all come from the same pod

Nixie:

Lyla:

Jacob Black:

Paul:

Quill:

Embry:

Leah Clearwater:

Jared:

Emily:

Sam:

Alice Cullen:

Bella Cullen/Swan:

Jasper Cullen:

Edward Cullen:

Renesmee Cullen:

Emmett Cullen: