Rotifers in the wild have little significance to humans. They may have some economic significance, however, because many species are cultured as a food source for aquariums and cultured filter-feeding invertebrates and fish fry. They also may be used as biological pollution indicators.
1. Floscularia ringens, 2. Ikaite rotifer (Notholca ikaitophila), S. Astrid's rotifer (Encentrum astridae), 4. Dissotrocha aculeata, S. Asplanchna pri-odonta, B. Cephalodella gibba, l. Seison nebaliae. (Illustration by Joseph E. Trumpey)
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