text: Some Sri Lankans perform this activity while sitting on single-poled stilts.
full_question: Some Sri Lankans perform this activity while sitting on single-poled stilts. People illegally use squirt bottles of sodium cyanide for this activity in the Philippines. Traditionally, Irrawaddy dolphins were trained to aid in this activity. Tokyo's Tsukiji market sells products of this activity. Aquaculture in hatcheries may someday bring an end to--for 10 points--what economic activity carried out with nets and hooks?
first_sentence: Some Sri Lankans perform this activity while sitting on single-poled stilts.