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Scientists Discover Giant, 2-Feet Long Clams That May Have Fed Prehistoric Humans
Carin Jantzen: A new species of giant clam, Tridacna costata, found in the Red Sea.
Giant clams two feet long might have helped feed prehistoric humans as they first migrated out of Africa, new research reveals.
The species, Tridacna costata, once accounted for more than 80 percent of giant clams in the Red Sea, researcher now say. Today, these mollusks, the first new living species of giant clam found in two decades, represent less than 1 percent of giant clams living there.
This novel clam, whose shell has a distinctive scalloped edge, was discovered while scientists were attempting to develop a breeding program for another giant clam species, Tridacna maxima, which is prized in the aquarium trade. The new species appears to live only in the shallowest waters, which makes it particularly vulnerable to overfishing.
