中文摘要：

2005年10月山东省荣成市远洋渔船的渔民偶然误捕了一头海豚,经鉴定,系伪虎鲸,且为畸形。主要鉴别特征：全身呈暗黑色,体细长,背鳍狭长而呈镰刀形,胸鳍前缘有一特有的隆起,即所谓的＂肘部＂,牙齿大,呈圆锥形,上颌齿数为14,下颌齿数为16。同时,还对其进行了较详细的观察和测量。畸形表现在：左右口角的形状不一;左鳍肢前缘有一明显的二分叉;雌性,乳沟内无乳头,但经解剖发现腹内却有一胎儿,系雄性,体长1.8m,体重40kg。

英文摘要：

One false killer whale was caught by bycatch in October, 2005 in Rongcheng, Weihai, Shandong Province, People＇s Republic of China. Some photographs and measurements （ biological and morphological data） of the false killer whale was taken. It is interesting to note that the shape of right and left flippers is different. The right flipper is a typical one and the left flipper has a gap. Right angle of gape is strange, looks like that of the baleen whale. These are probably healed wounds entangled in a fishing gear or something else. These two strange shapes could be results of these injuries in the very early stage of this animal＇ s life. By examing them carefully, it is found that they are very smooth at the surface, these could be morphological malformation. This killer whale is a female with body length 4. 18 m and weight 780 kg. She is pregnant, and the fetus is a male with body length 1.8 m and weight 40 kg, but no nipple in the mammary slit.