You can transform into a small sea creature, using your fins to traverse water as easily as land.

Daily   ✦     Polymorph, Primal
Minor Action      Personal

Effect: You assume the form of a Tiny or Small aquatic beast, such as a fish or eel, until the end of the encounter, or until you end the effect as a free action. In this form, you gain a swim speed equal to your speed and you can breathe underwater. While in this form, you can't attack, move on land, or use magic items.

Published in Dragon Magazine 382, page(s) 55.