'The sea urchin is covered with sharp, pointed items called these with which it moves along the seafloor'
Quills
SEA CREATURES: The sea urchin is covered with sharp, pointed items called these with which it moves along the seafloor
The sea urchin is covered with sharp, pointed items called these with which it moves along the seafloor
The sea urchin is covered with sharp, pointed items called these with which it moves along the seafloor
SEA CREATURES
Quills
SEA CREATURES