minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming; important in some food chains and as intermediate hosts of parasitic worms that affect man e.g. Guinea worms.

• 微小的自由游动的淡水桡足动物，中眼大，有梨形身体和用于游泳的长触角；在某些食物链中重要，~下转例子部分。