Swimways Sea Squirts Killa Whale Life Jacket They are fun and kids WANT to wear it. Sea Squirts look like fish for a serious reason. Each design has a flexible fin on the back to help kids get carried away with creative play. It's a brand new idea and there's nothing like Sea Squirts on earth. Swimways Sea Squirts Life Jackets are Type III U.S. Coast Guard Approved Personal Flotation Devices Fin folds over when leaning back for active use The arm-hole sizing insures a proper comfortable fit so the strap between the legs doesn't have to be too tight. Grab me fin can be used as swimming aid