Small fish follow sharks around to feed off the scraps of their kill.
Titles read: "Queer Citizens of the Sea. 'The Grafters' - No. 1".
Location of events unknown.
Various shots of a dog shark swimming around in a tank. A smaller fish follow the shark around, and commentator explains this fish eats the scraps from the shark's kill. It also clings onto the belly of the shark with a small sucker, so is carried along wherever the shark goes.
Several larger pilot fish follow a sand shark (?) around a tank.