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Archive 1268: Daily Pix FULL SIZE
(For personal use only: NOT public domain)
Mmm, right click, add, set as background...

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Limulus polyphemus, a/the Horseshoe Crab. This species is principally a sand-sifting filter feeder, though there are other horseshoe crabs that are more predatory. Up to a foot in diameter. Most die from a lack of nutrition in captivity, due to insufficient size, depth, culture of live sand organisms. Aquarium photo. 
 

 

Out last March diving; well, snorkeling here; in Huahine. Wondered what this is... Have dived (several times) the type locality... this could be an example of the at-times high polymorphism of stony corals... vis a vis local conditions of light, current, food availability.... on p. 136 of "guide: des recifs coralliens de Tahiti et ses iles" and https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:a2481237-3b76-41f9-b802-15f489ff4484 appears to be Porites rus Forsskal 1775, Plate and Pillar Coral. Variable in shape as its common name points to. Upright columns more shallow to gorgeous plates deeper, more calm waters. Gray to brown in color, often with yellow polyps that have wider spaced calyces, raised areas between polyps. What say you?



Out last March diving; well, snorkeling here; in Huahine. Wondered what this is... Have dived (several times) the type locality... this could be an example of the at-times high polymorphism of stony corals... vis a vis local conditions of light, current, food availability.... on p. 136 of "guide: des recifs coralliens de Tahiti et ses iles" and https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:a2481237-3b76-41f9-b802-15f489ff4484 appears to be Porites rus Forsskal 1775, Plate and Pillar Coral. Variable in shape as its common name points to. Upright columns more shallow to gorgeous plates deeper, more calm waters. Gray to brown in color, often with yellow polyps that have wider spaced calyces, raised areas between polyps. What say you?
 

 

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