trawling

verb
  1. 1

    To take (fish or other marine animals) with a trawl.

  2. 2

    To fish from a slow-moving boat.

  3. 3

    To make an exhaustive search for something within a defined area.

noun
  1. 1

    A commercial fishing technique in which a net is dragged by a moving boat.

  2. 2

    A laborious search.

Source: https://en.wiktionary.org/wiki/trawl, https://en.wiktionary.org/wiki/trawling