Dolphins in Laguna, south Brazil, are helping fishermen with their work. As they swim, the dolphins push groups of fish near the fishermen. When the group is big enough, the dolphins make a sign with their heads or tails. This way, the fishermen know when to throw their nets. This shows that dolphins can work together, and work with people. It also shows that dolphins are intelligent because they learned to do it by themselves. Dolphins understand that by helping the fishermen, they also get more fish to eat. Scientists studied the dolphins in Brazil for two years. They are interested in this story because not every dolphin wants to help. This means that dolphins are like people: some are helpful, and some are not.
巴西南端拉古納海域的海豚，會協助漁夫捕魚。海豚游來游去的時候，會把魚群推向靠近漁夫的海域。當魚群夠龐大時，海豚會以頭部或尾巴示意，讓漁夫知道何時該撒網。 此現象顯示，海豚屬於團結合作且能與人類共事的動物。也顯示出海豚十分聰明，因為牠們能無師自通。海豚知道幫助漁夫等於幫自己找到更多食物的道理。 科學家研究巴西的海豚已有兩年的時間，他們對此故事感興趣的原因在於不是每隻海豚都願意幫忙，這表示海豚和人類一樣：有的很熱心，有的則不盡然。 | 
