Final answer:
The National Indian Youth Council utilized 'fish-ins' as a form of civil disobedience to advocate for Native American rights and draw attention to discrimination.
Explanation:
The group known to use 'fish-ins' as an act of civil disobedience was the National Indian Youth Council. In the 1960s, the National Indian Youth Council (NIYC) organized 'fish-ins' where activists and celebrities cast nets in protest against conservation laws affecting tribal fishermen on reservations.
This action was part of the Red Power movement, which aimed to draw attention to Native American issues and combat discrimination through direct action and protests.
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