Fella at the bait shop tossed me a couple dozen of these today and that what he called em. The little thingy comein out the end of it will latch on to ya and stay. LOL! Can anyone shed any lite on them for me? He also said that they will die quick in fresh water. Brackish water that I fish alot is just fine for em. Told not to hook em through the head cause thats instant death. Just once through the skin and you'll be fine. All I know is they are gonna get tested this week. LOL! THANX!