I ordered shrimp from the Loire river -- so, it's freshwater shrimp -- with tapenade.

史蒂夫：我从卢瓦尔河订购了虾——所以，它是淡水虾——配橄榄酱。

The overachiever in question is a crustacean called an ostracod, which is a type of tiny freshwater shrimp.

有问题的优胜者是一种叫做介形类的甲壳类动物，它是一种微小的淡水虾。