Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Two species of bullhead fish introduced into this body of water in the 1960s died out within thirty years due to changing salinity, which also encourage the growth of saxaul plants on its shores. Vozrozhdeniya Island in this body of water was used as a research station for (*) biological weapons. The delta between Muynak and Nukus on the southern coast of this sea was a center for muskrat trapping, one source of employment for the Karakalpak people. The Qaraqum Canal diverted water to irrigate cotton fields that should have flowed into this sea, which could no longer be replenished by the Syr Darya. For 10 points, name this sea once found between Kazakhstan and Uzbekistan.
Social Science