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dugong feeds on seagrass in the Red Sea
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Dugong Feeding

 Dugongs, along with manatees, make up a group of marine mammals called sirenians or...
Hedbergella sliteri - this specific specimen is the "holotype" for this species. That means it is the reference point for what all members of the species should look like.
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Hedbergella sliteri

 Hedbergella sliteri - this specific specimen is the "holotype" for this species....
Color illustration of an ancient bivalve.
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Elevator Rudists

 These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...
Notice the pink tentacles, which “recliners” used to filter feed.
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Recliner Rudists

 Where ocean currents were strong, ancient rudist “recliners” lay unattached on...
Rudist clams are mollusks that went extinct about 65 million years ago.
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Rudist Clams

 Rudist clams are mollusks that went extinct about 65 million years ago. They were...