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The artist is the Sand Bubbler Crab (Scopimera inflata) pictured here at Cape Tribulation, North Queensland, Australia.
"Sand bubbler crabs live in burrows in the sand, where they remain during high tide. When the tide is out, they emerge on to the surface of the sand, and scour the sand for food, forming it into inflated pellets, which cover the sand. The crabs work radially from the entrance to their burrow, which they re-enter as the tide rises and disintegrates the pellets. The material consumed by sand bubbler crabs has a very low concentration of organic matter, which is concentrated by egestion of indigestible material."[wikipedia]
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A turned-around palm tree? Art by the sand bubbler crab (scopimera inflata) at Cape Tribulation Breach in Queensland, Australia. For more information: goodacres.blogspot.com/2008/04/sand-bubbler-crab-art.html
A Beach Thick-knee on Mindil beach near Darwin, Northern Territory. It was picking off stragglers from the masses of Sand Bubbler crabs on the sand flats.
cloudtogroundimages.com/2013/12/26/northern-territory-exi...
The beach is covered with these little patterns. They are made by sand bubbler crabs who place little balls of sand outside their holes. The amazing thing is, the patterns are all different.
They do this by collecting and sifting the sand, actually checking each grain, and rolling those parts devoid of anything useful for them into little balls (sand bubbles) that they toss behind.
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More about this crab on wildsingapore.
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More about this crab on wildsingapore.
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More about this crab on wildsingapore.
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More about this crab on wildsingapore.
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More about this crab on wildsingapore.
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God has designed their colors to match the color of seashore sand.
Can you see the small sand bubbles around the crab?
These tiny animals are called Sand bubbler crabs (Pu Lom in Thai). Beside the fact that they can run very fast, they also form these tiny sand balls around their hole. The ball's size is as big as their body. Each ball takes about 10 seconds or even less to form. But the question is: "Why do they do this?"
The answer is simple. It is all about food.
High tide brings organic substances onto the beach. At low tide, these crabs will come out of their holes, looking for food.
They use their claws to take the sand through their mouth and after having eaten all organic materials from it, they will release the sand again. During this process, however, they will shape the sand into tiny balls. These crabs will form about 360 balls per hour, and these balls are not just being scattered around. Amazing patterns are being created that soon, after 3 or 4 hours, cover most of the beach.
So, why do they form these patterns? In this way they make sure that they don't come back and eat the sand again that has already been stripped of organic material. Smart, isn't it?
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The work of sand bubbler crabs: the estuary flats of the Tomaga river covered in the blobs of sand they leave when feeding.
The beaches were covered with those little balls of sand, and Kiara and I were wondering what caused them. It was a mystery until we almost stepped on this little guy. They are sand bubbler crabs, they live in those holes, and pick out the goodies from the sand then leave their extras in cute little balls.
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