Kate Lacey is obsessed with Betta splendens, tiny, fierce and flamboyantly colored and finned tropical fish she owns and breeds in her San Francisco apartment, where this interview took place. Where ...

What is a betta fish? Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their scientific name, Betta splendens, combines two languages: Malay for ...