Bubble Corals have modified tentacles that get inflated with water so as to provide light for their symbiotic algae.
At night, the bubbles are deflated to make room for other, more ordinary tentacles that capture prey.
They also have another set of even longer tentacles known as sweepers that are used to attack other corals. Those bubbles need their space, after all.
EGYPT Cairo 1920
Autochromes taken by Gervais Courtellemont and W. Robert Moore for National Geographic.
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whenever i’m like ‘that girl is beautiful’ ppl are always like ‘well you’re beautiful too!’ like … i’m not jealous i’m just gay? relax?
It’s 2 AM and this is the funniest thing i have ever seen in my life. Tears are streaming down my face.
Who thought this would be a good mashup? And why?
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Pulse Corals are unique in that they’re constantly in motion!
Their polyps are long and thin and topped by eight tentacles which rhythmically open and close all day and all night.
It has nothing to do with capturing prey, for these corals get almost all their food from symbiotic, photosynthesising zooxanthellae.
It seems the pulsing actually assists those same photosynthetic microbes. It helps the coral get rid of oxygen so that their guests can better get to work turning sunlight into food.
It also happens to be rather mesmerising!
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