Microscopic marine algae called phytoplankton are eaten by micronekton, like shrimp, which are eaten by smaller fish, which in turn are eaten by tuna and that's just one chain of a much wider ecosystem.

被称为浮游植物的微型海洋藻类会被微型浮游生物吃掉，比如虾，而虾又会被体型较小的鱼类吃掉，这些鱼类又会被金枪鱼所食，而这只是一个更加广泛的生态系统食物链中的一条。