The gulls try to panic the puffins in the hope that they'll drop some of their sand eels.
银鸥试图威吓海鹦,使它们丢下几条口中的沙鳗。
英语百科
Sand eel
Sand eel or sandeel is the common name used for a considerable number of species of fish. Most of them are sea fish of the genera Hyperoplus (greater sand eels), Gymnammodytes or Ammodytes. Many species are found off the western coasts of Europe from Spain to Scotland, and in the Mediterranean and Baltic Seas.