描写鲨鱼外貌的英语

sharks are cylindrical in shape with tapered edges. This streamlined structure allows these carnivorous hunters to cut through the water in pursuit of their prey. Most sharks average a length of about 5.8 to 7 metres, much the same as human beings. The smallest species, known as the Lantern Shark, measure less than 20 centimetres, while the enormous Whale Shark measures an astounding 12 metres, on average.