Nature's Braille
For Macro Mondays theme 'Macro Textures' and the Flickr Worldwide Photowalk 2016.
A sea urchin skeleton ('test') found on a seashore walk, Isle of Skye, showing its pentameric radial symmetry. To give an idea of scale, the largest of the circular knobs is about 1 mm. These structures are where the spines are attached. The tube feet that the sea urchin uses for movement, come out of the test through the tiny paired holes.
Nature's Braille
For Macro Mondays theme 'Macro Textures' and the Flickr Worldwide Photowalk 2016.
A sea urchin skeleton ('test') found on a seashore walk, Isle of Skye, showing its pentameric radial symmetry. To give an idea of scale, the largest of the circular knobs is about 1 mm. These structures are where the spines are attached. The tube feet that the sea urchin uses for movement, come out of the test through the tiny paired holes.