Hello friends welcome to museum of Zoology Department, Shri Shivaji Science College, Nagpur. I am Velella, commonly known as by-the-wind sailor. I have a flat, oval-shaped body with a sail-like structure. I float on the surface of the ocean. I am moved by wind and currents. I have a symbiotic relationship with certain algae. I am found in warm and temperate ocean waters. My presence indicates healthy marine ecosystems.