“A horrendous slaughter is going on out here,†said Peter D. Ward, a biologist from the University of Washington, during a recent census of the marine creature in the Philippines. “They’re nearly wiped out. The culprit? Growing sales of jewelry and ornaments derived from the lustrous shell. To satisfy the worldwide demand, fishermen have been killing the nautilus by the millions, scientists fear. Now marine biologists have begun to assess the status of its populations and to consider whether it should be listed as an endangered species to curb the shell trade…Catching the nautilus is a largely unregulated free-for-all in which fishermen from poor South Pacific countries gladly accept $1 per shell. Scientists worry that rising demand may end up eradicating an animal that grows slowly and needs 15 years or more to reach sexual maturity — an unusually long time for a cephalopod. (Its cousins include the squid and the octopus.)â€