Piece of rock on a white surface with a ruler next to it

Brown treehopper perched atop a piece of wood

Man in a boat with a shark in the water

Piece of black truffles on a white background

Piece of wood on a white background with a scale on the right side

Black and white photo of four fish on a black background

Close up of a worm on a black background with a scale at the bottom

Long-horned beetle

Pair of metal spurs on a white surface