Six yellow seahorses belonging to the same species are found to be active in the eastern waters of Hong Kong, but two other species are now missing, says an Ocean Park study. The park's Conservation Foundation conducted a year-round survey of the fascinating creatures last year and discovered one male and five female seahorses belonging to the same species, Hippocampus kuda. Two other species, the three-spot seahorse and the great seahorse, which were discovered in a 2010 survey, could not be located. "We are still searching for the other two species, but it is too early to say whether they have disappeared from Hong Kong waters or not," said principal investigator Shadow Sin Ying-tung. "Seahorses live in shallow tropical and temperate waters and hide themselves in mangroves, seagrass beds, corals reefs and estuaries. It is not easy for us to spot them," Sin said. The foundation hired 12 divers to inspect 31 locations, and all the seahorses ...