Round 1: Tossup 5

A system named for these animals in Utrecht functions by giving users the ability to press a doorbell when they are present. Migration of these animals is termed anadromous or catadromous. At Brewarrina, Aboriginal Australians built a set of prehistoric “traps” for these animals (-5[1])that were damaged (15[1])by a weir (15[1]-5[1])in the 1970s. UNCLOS established EEZs to resolve conflicts over these animals (15[1])between (-5[1])the (*) UK and Iceland. Raceways and circular (10[1])cages are used to farm these animals. Ladders designed for these animals allow them to bypass dams when migrating. For 10 points, name these animals that travel in schools to lay eggs, such as mackerel. ■END■ (10[1])

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