Although they are often called trout, the Dolly Varden is actually a char. Char have dark bodies and light spots while trout have light-colored bodies and dark spots. The name Dolly Varden comes from a 19th century pink cloth pattern.
The Dolly was once persecuted in Alaska because they eat salmon eggs. For each Dolly tail turned in, a bounty of 2-5 cents was awarded. The state eliminated the bounty in 1939. Research has since shown that Dolly predation on salmon eggs can help weed out loose, damaged, dead, or infected eggs and ultimately prevent the spread of disease.