Saltwater Fish
White-streaked Grouper

Species Description…

Scientific Name: Epinephelus ongus
Common Name: White-streaked Grouper
Species Group: Grouper
Habitat: Fish Only
Care Level: Advanced
Temperament: Highly Predatory
Diet Type: Carnivore
Role in Aquarium: Predator
Max Fish Length: 20 (inches)
Min Aquarium Size: 200 (gallons)
Native Range: Indo-Pacific, including the Red Sea, Indonesia, and the Philippines
Epinephelus ongus - White-streaked Grouper

Epinephelus ongus (White-streaked Grouper)

Overview

  • Found in the Indo-Pacific region, including coral reefs and coastal waters.
  • Recognized by its dark brown body covered with small white spots.
  • A carnivorous species known for its ambush hunting behavior.
  • Typically inhabits reef crevices and rocky outcrops for shelter.

Feeding

  • Predatory diet primarily consisting of small fish and crustaceans.
  • Readily consumes live prey, frozen seafood, and meaty pellets.
  • Occasionally supplements diet with squid and cut fish pieces.
  • Should be fed a protein-rich diet to maintain health and vibrant coloration.

Habitat

  • Typically found in rocky reefs and coral structures.
  • Prefers areas with ample hiding spots to ambush prey.
  • Requires a spacious aquarium with stable water conditions.
  • Thrive in environments with moderate water movement.

Fish Care

  • Optimal water temperature: 74-82°F (23-28°C).
  • Ideal pH level: 8.1-8.4, with a specific gravity of 1.020-1.025.
  • Requires a large aquarium due to its potential growth size.
  • Can be territorial, especially towards similar-sized fish.
  • Regular water changes and strong filtration are essential.

Compatibility

  • Best suited for tanks with similarly sized or larger tank mates.
  • May exhibit aggressive behavior towards smaller fish.
  • Compatible with other groupers, eels, and large wrasses.
  • Solitary nature means it does well as the dominant predator in the tank.

Aquarium Behavior

  • A nocturnal predator, often hiding during the day.
  • Prefers to stay near rock crevices and ledges.
  • Will aggressively defend its territory if threatened.
  • Exhibits ambush-hunting behavior, striking prey swiftly.