An Uranoscopidae egg collected outside Yangtze River estuary, East China Sea, Apr 2011. Diameter 1.84mm.Due to the specimen was not in good condition, oil globules which were described as multiple oil globules before(Uranoscopus japonicus, Okiyama 1988, Shao 2001) can not be observed, but clearly hexagonal grains on the egg membrane is shown below：...