The Spotted Grouper, also known as the Whitespotted Grouper, Summan Grouper, or Speckled Fin Grouper, has a dark brown to black body marked by white polka-dots.
A 70 gallon or larger aquarium is required due to its size and feeding habits. It is an extremely aggressive fish and may eat tank mates as well as crustaceans.
The Spotted Grouper prefers a diet of meaty foods such as krill, shrimp, and other small fish.
I got this from www.liveaquaria.com
they have information on quite a few fish. This is one of the sources I use before purchasing new fish.