LOS ANGELES, CA - NOVEMBER 17: The BMW i8 plug-in hybrid all-electric concept car makes its North American debut at the Los Angeles Auto Show on November 17, 2011 in Los Angeles, California. The car show opens to the public tomorrow and runs through November 27. (Photo by Kevork Djansezian/Getty Images)
Hotel staff practice self-defence skills after a training session given by team member of Special Weapons and Tactics (SWAT) team, in Hangzhou, Zhejiang province, April 7, 2016. (Photo by Reuters/Stringer)
“An egg case or egg capsule, colloquially known as a mermaid's purse or devil's purse, is a casing that surrounds the fertilized eggs of some sharks, skates, and chimaeras”. – Wikipedia. Photo: OBX Skate (Raja eglanteria) Egg Case – Mermaid's Purse. (Photo by altereye1)