The Polleni Grouper, Cepholopholis polleni, also known as the Harlequin Hind, Harlequin Grouper, or Harlequin Rockcod, is a rare and beautiful species of grouper. It has a fantastically colored green, yellow, and sometimes purple body with yellow tipped fins. They are aggressive eaters and should not be housed with small fish or inverts so they are more suited to a fish only tank. A tank of at least 200 gallons is best to house this fish as they can grow up to 14 inches. The Polleni Grouper will eat most meaty foods such as krill, silver sides, clams, and shrimp and should be fed 1-2 times per  day.