It will hardly come as a surprise that elephants and whales have big testes: these creatures are after all weighty fellows. In one adult elephant the two testes weighted 1.8 kg. and 2.2 kg. respectively, and the left one measured 175mm. x 150mm. x 115mm. in length, width, and thickness. It has been noted that bladder urine collected as much as twelve hours after death contained a large number of motile sperm. The really massive testes however belong to whales. On the whale the testes are only visible when the abdominal cavity has been opened and the intestines removed or pushed aside: the testes are two fairly elongated cylindrical organs with a white, smooth, and shiny surface. As has been pointed out, even when the whale testes have been located they are hard to handle since they weigh 60, 15, and 25 lb. in Fin, Sei, and Sperm whales respectively. In Blue Whales the testes may be more than two feet six inches long and weigh up to 100 lb, each!