Propelling the hollow, plastic head was a hermit crab who'd adopted the object to serve as his shell. As far as Cronk could tell, the little guy was able to move it with little difficulty.
"The crab seemed fine," Cronk told The Dodo. "It went to the water and seemingly sat there to ponder life."
But Cronk, who initially found the scene sort of amusing, got to pondering, as well. The crab's odd choice for an abode was only made possible because of a larger problem — improperly disposed-of garbage.
Truth is, some 4.8 to 12.7 metric tons of plastic waste enters Earth's oceans every year.
Cronk hopes his now-viral video will inspire people to do their part in cleaning up the mess.