Sixteen Black Dot Tentacles by Ernst Haeckel.
This may look like an abstract or a mathematical exercise; it’s not. It’s an illustration of a microscopic life form. I think this one is a juvenile medusan – a baby jellyfish or coral polyp.
Browse more awesomeness at the Kunstformen dur Natur (Artworks of Nature) site.
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Or, if you’re just into strange things with tentacles, gaze deeply into the vampire squid’s eye.