The Polleni grouper (Cephalopholis polleni), also called the Harlequin Grouper or Polleni Rock Cod, is a fascinating and rare marine fish found in the warm waters of the Indo-Pacific, particularly around coral reefs near Madagascar and Mauritius. Known for its striking colors and patterns, this grouper is highly prized in the aquarium trade but is also relatively uncommon.
Here’s a breakdown of its key characteristics:
Appearance: The Polleni grouper has a unique speckled or mottled pattern of black, white, and yellow, sometimes with hints of purple or blue on its scales, creating a “harlequin” effect. Its fins are often edged with contrasting colors, making it a very visually appealing fish.
Size: This grouper is a mid-sized fish, typically growing to around 12-15 inches (30-38 cm) in the wild, though they may remain smaller in captivity.
Diet: Carnivorous by nature, Polleni groupers primarily feed on smaller fish, crustaceans, and invertebrates. They are ambush predators, using their camouflage to blend into the reef before striking.
Behavior: Known to be solitary, Polleni groupers can be territorial and somewhat aggressive, especially toward other fish of similar size or appearance. Due to their reclusive nature, they prefer rocky habitats or caves where they can hide and feel secure.
Specimen is 5″
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