Genuine hairy crabs from Yangcheng Lake are not yet ready for harvest and any 'lookalikes' now on the market are impostors, the secretary-general of the Suzhou Crab Business Association said. Shen Xuexing was quoted by China News Service as saying that hairy crabs from Yangcheng Lake - a must-have delicacy for Chinese connoisseurs during autumn - would only be ready for harvest later this month and any hairy crabs now on the market were not from Yangcheng. He said that because Yangcheng crabs fetched top prices due to the limited supply, many small ponds from outside the designated Yangcheng Lake hairy crab area would be selling lookalikes this month and next. He said the lookalikes - which could be of the same breed as their close cousins in Yangcheng Lake - did not qualify to be called Yangcheng Lake hairy crabs and some farmers fed them with antibiotics to make them grow faster. Mr Shen was responding to reports from Taiwan that a hairy crab imported from the mainland, and sent by the cable television station ETToday to a food testing company, was found to contain 10 times the safe level of chloramphenicol, an antibiotic that can cause liver damage. Officials in Suzhou , Jiangsu province , yesterday said only a small proportion of hairy crabs from the Suzhou lake area could qualify to be called Yangcheng Lake hairy crabs. Xinhua said in order to ensure consumers could tell the difference, all Yangcheng Lake hairy crabs would be issued with an anti-counterfeit icon - a circular ring.