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There are two varieties commonly offered in the trade, easily distinguished by coloration. Those from the Indo-Pacific have a grayish-blue throat and belly, while those from the Red-Sea/Indian Ocean have a bright yellow, sometime orange throat and belly. It is thought by many that Red Sea/Indian Ocean Regals are much hardier than Indo-Pacific Regals. Having said that, I have an Indo-Pacific and it is doing very well and eats like a champ - perhaps and exception to the rule.
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