Yesterday I posted a photo of a crown-of-thorns star, with a few rock-boring urchins in it. Today’s post shows one example of the channels left by these urchins. This image initially looked like a brain to me, but then I began to see more of a tree in it.
Posted in response to Becky’s October Squares challenge theme of ‘Past Squares – Spiky/Lines.’ See more responses here.
Graham's Island 
I’m with you on looking like a brain – not me – but your picture. Very cool, Graham.
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It does have that look about it.
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Indeed!
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Tree brain for sure Graham 🙂
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Smart trees! I bet Google is working on that.
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😂
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Wow who’d have thought urchins were great at rock art!
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Their handiwork can be seen all along the coast. Very prolific.
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How wonderful
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