Oh my God, it's a mirage, I'm tellin' y'all, it's a sabotage!I had one in the outboard bracket of my last boat, glued down.
Yes they definitely work, not in a ground breaking manner, but the sharks are attracted to them.
At the same time, sharks are attracted seemingly to anything, a bright colored object floating in the water, banging the side of the hull, a diesel/motor oil slick - their drive seems to be meandering around investigating what they sense, even if they are not necessarily hungry, that's just how they are programmed. You could probably play the beastie boys into the water and eventually some shark is going to come along and bump the speaker.
Yep the did. As I say. "Anything works sometimes, Nothing woks all the time"