Abstract: 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.

Key words: Bycatch, False killer whale (Pseudorca crassidens), Toothed whale

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1.8 m,体重40 kg。

关键词: 齿鲸, 伪虎鲸, 误捕