Researchers from the National Institute for Amazonian Studies (INPA) use nets to collect specimens of pacu, a fish that eats fruits and nuts, on the Rio Negro in Amazonas state, Brazil.

• 在巴西亚马逊州的里奥内格罗河上，来自亚马逊国家研究所的研究员正在用网捕捉一种食用水果以及坚果的鱼的样本。