for those who want to know more...
http://www.wetwebmedia.com/dascyllu.htm
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Of similar appearance to the three-spot and unfortunately, temperament, is the Hawaiian endemic, Dascyllus albisella. More striking as a juvenile, with darker black and a bolder, larger triangular body spot, the Hawaiian is no match for the domino in sturdiness. I'd suggest Dascyllus albisella only for a biotopic, or serious study set-up.
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Dascyllus albisella Gill 1862, the Hawaiian Dascyllus. Central Pacific: Hawaiian and Johnston Islands. To five inches. A poor shipper, and as nasty a biter as the similar Three-Spot, Domino, Dascyllus trimaculatus. Hawai'i pix of very small (1/2"), younger (2"), older (3") individuals.