Sea turtles can survive being struck by a boat propeller — but as they heal from the trauma, their shells often change shape, bulging from air building up within their bodies. That throws the animals' ...

Charlotte, a male green sea turtle, wears a 3D-printed harness to help him overcome "bubble butt syndrome" — a condition caused by a boat strike. Charlotte lives at the Mystic Aquarium in Connecticut.

"Bubble butt" can leave turtles struggling to swim normally — or unable to submerge at all. A 3D-printed harness can help. Sea turtles can survive being struck by a boat propeller — but as they heal ...