原来是可能有腮一样的器官。 The scientists believe that the Chinese soft-shelled turtle uses gill-like projections on the inside of its mouth to expel the urine, much like fish urinate out of their gills. Although the Chinese soft-shelled turtle numbers in the millions in captive farms, the species is vanishing from the wild. Currently the IUCN Red List categorizes the species as Vulnerable. CITATION: Ip, Y. K., Loong, A. M., Lee, S. M. L., Ong, J. L. Y., Wong, W.P. and Chew, S. F. (2012). The Chinese soft-shelled turtle, Pelodiscus sinensis , excretes urea mainly through the mouth instead of the kidney. J. Exp. Biol . 215, 3723-3733. Read more at http://news.mongabay.com/2012/1011-hance-turtle-urinates.html#DcIHEpPXKdiSuE7f.99