Pivotable swim fin

Positive drive swim fin

Practice swim fin with perforations

Propulsion aids for attachment to a swimmer's feet

Propulsion device for use with swimmers

Retractable fin assembly

Retractable swim fin

Retractable swim fin

Scuba diving fin

Scuba fin

Short motion swim fin

Short motion swim fin

Short motion swim fin

Spear-blade swim fin

Staged expandable swim fin

Stretchable foot pocket of fin

Structure of amphibious shoe

Swim and scuba fin

Swim assist system and method

Swim fin