I absolutely love them and the reasons for them. My great white shark stays on with no problems because of the way the tail hooks the loop. The whale tail can slip off if not careful and my hammerhead is gone in the wind because the loop slipped off his head before I realized it was gone. I hope to get another hammerhead and be more careful, just not right now. I also got 2 turtles as gifts. I think if the loop stays taut they should stay hooked over the curved front legs (flippers?, fins?). I had an error in shipping but they corrected it quickly!
I love it!!!