You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: ON THE COAST 
Clue: A 19th c. "Committee of Vigilance" fought the crime that gave part of San Francisco this North Africa-inspired nickname
the barbary coast

Category: ENDS IN "TH" 
Clue: This fish was thought to be extinct millions of years ago until one was found off South Africa in 1938
coelacanth

Category: NATIONAL MEMORIALS 
Clue: A memorial in Arizona to this Spaniard commemorates the 1st European exploration of the Southwest

francisco de coronado