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Because these cookies are strictly necessary to deliver the website, refuseing them will have impact how our site functions. You always can block or delete cookies by changing your browser settings and force blocking all cookies on this website. Phylogenetic relationships among the clownfish-hosting sea anemones.
ScienceDaily, 19 June American Museum of Natural History. Finding 'Nemo's' family tree of anemones: New study details evolutionary relationships of clownfish-hosting. Retrieved November 12, from www. But how these distinctive patterns form has long remained a mystery. Now, a new study The work ScienceDaily shares links with sites in the TrendMD network and earns revenue from third-party advertisers, where indicated. For an optimal experience visit our site on another browser.
Politics Covid U. News World Opinion Business. Share this —. Follow NBC News. In addition, their feces serve as an important source of nitrogen for the anemone, and some research suggests that as the fish wiggle through the anemone's swaying tentacles, they help oxygenate the host, possibly helping it grow.
There are about 30 clownfishes that have this symbiotic relationship with anemones, and they originated in the "coral triangle" of southeast Asia. There are 10 described species of clownfish-hosting anemones, but scientists suspect that the total number may be much higher. And the information on the origin of these species, as well as the number of times the symbiosis evolved in anemones, is sparse and dated.
They found that as a group, anemones independently evolved the ability to host clownfish three times throughout history. That finding in itself was not unexpected, but the groupings of the species were very different than what previous work had predicted. Two of the three independent groups originated in the Tethys Sea, an ancient ocean that separated the supercontinent of Laurasia from Gondwana during much of the Mesozoic, and in today's geography, is located near the Arabian Peninsula.
The data are unclear about the origin of the third group. The findings suggest that these anemones, at least the ones that originated in the Tethys, are quite old, living at least 12 to 20 million years ago and possibly earlier. Research on this group is especially relevant as clownfishes—and their anemones—face threats from the aquarium and pet trade. More from Biology and Medical.
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