一、什么是水蚤。水蚤是在富营养化、有机物轻度污染的水域中大量孳生的各种浮游动物的统称。水蚤的种类很多,各地叫法不一。主要包括以下几类:1.灰水,是浮游动物中原生动物的俗称,它包括有砂壳虫、表壳虫、棘壳虫、太阳虫、尾毛虫等。这些浮游动物很小,肉眼较难区分其 First, what is the water flea? Daphnia is a collective term for various zooplankton that breeds in abundance in eutrophic, slightly-contaminated waters of organic matter. Daphnia many different types of different names. Mainly include the following categories: 1. Gray water, is a common name for zooplankton protozoa, which includes sand and shell worms, case insects, spines insects, sun insects, such as trichinosis. These zooplankton are small and hard to distinguish with the naked eye