Coral Grouper

The coral grouper (Cephalopholis miniata), also called coral trout or coral hind, is a small to medium-sized member of the family Serranidae widespread across the Indo-Pacific, from the Red Sea and East Africa to the central Pacific and southern Japan to Australia. It is among the most visually distinctive groupers due to its bright orange body and dense covering of blue spots. The species is closely associated with coral reef habitat and is a common sight for divers on healthy reef systems. It is a protogynous hermaphrodite like most groupers and plays a role as a mid-level predator on coral reefs, helping regulate populations of small reef fish and invertebrates.

Coral grouper are easily recognized by their striking coloration.

• Color: bright orange to reddish body densely covered with small, round, electric-blue spots from head to tail, including the fins.
• Body shape: compact, oval, and moderately deep-bodied, typical of Cephalopholis groupers.
• Fins: rounded pectoral and dorsal fins; tail is rounded to slightly truncate.
• Size: typically 30-50 cm.
• Similar species include the peacock grouper (darker body, fewer, larger spots) and the blue-spotted hind — coral grouper is distinguished by its more solid orange base color and uniformly small, dense blue spotting.

Coral grouper are found throughout the Indo-Pacific, from the Red Sea and East African coast across the Indian Ocean to the western and central Pacific, north to southern Japan and south to Australia. They inhabit coral-rich reef slopes, lagoons, and drop-offs at depths of roughly 2-150 m, though they are most commonly encountered by divers between 3 and 30 m. The species prefers clear, warm tropical water with abundant coral cover, sheltering among branching and massive coral formations and crevices during the day.

Coral grouper are solitary, territorial ambush predators that rest near coral outcrops and dart out to seize passing prey such as small fish and crustaceans. They are most active during the day and retreat into reef crevices at night or when threatened. Like other groupers, they are protogynous hermaphrodites, developing first as females with some individuals later changing to males. Spawning typically involves pair or small-group courtship near reef structure rather than large aggregations. As mid-level reef predators, coral grouper help keep populations of smaller reef fish and invertebrates in check, contributing to overall reef community balance.