White-spotted Grouper

Picture of a White-spotted GrouperEpinephelus sp.
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I have a white spotted grouper he is sick, he hardley eats, he has a white film over his body. Also he has large white oval spots on him. What can I Do?  Cindy Polson

   This is a really hardy fish, the White-spotted Grouper is not always a real pretty fish, but it's a real survivor!

   We bought the grouper in our picture above as a White-spotted Grouper. We are not sure what species it is, but it looks to be of the genus Ephiniphelus. There are many fish in the Ephiniphelus genus. We have had this fish for several years and it has stayed the same size, so we believe it is full grown.

For more Information on keeping this fish see:
Guide to a Happy, Healthy Marine Aquarium

White-streaked / Whitespotted Grouper (Epinephelus ongus)
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Whitespotted Grouper juvenile feeding response.

This juvenile Whitespotted Grouper has the same lightning flash hunting reaction as the adults! Looking at the pattern we can determine that this is a juvenile fish since adults have white irregular rows of lines and large white blotches. This grouper will grow to 11.8" (30 cm) and will require a 75 to 90 gallon tank that does not have any tank mates that can fit into it's mouth! Groupers come to know their owners and are great long term pets!

Whitespotted Grouper Epinephelus ongus
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Adult Whitespotted Grouper in the wild.

This is an excellent video of an adult Whitespotted Grouper with it's adult coloring. You can see the white splotching on the body, white lines, and dark margins on the back of the dorsal, anal and tailfin. To get an idea of the full size of this fish, you can see adult Blue-Headed Wrasses nearby who are dwarfed in comparison to this 12" grouper. Most websites recommend a 150 gallon tank. This grouper is very aggressive and will defend it's hideout quite adamantly!

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Maintenance difficulty:

   The White-spotted Grouper is easy to keep because it eats everything (and quickly!)


   Feed all kinds of live and prepared foods, squid, clams, shrimp, chopped fish, lancefish, or silversides.

Habitat: Natural geographic location:

   Found in the Indo-Pacific.


   Like most groupers it is a meat eater that preys on small fish.

Social Behaviors:

   This fish is a solitary predator that hangs out among the rocks waiting for prey.

Sex: Sexual differences:


Light: Recommended light levels:

   No special requirements.




   No special requirements.

Length/Diameter of fish:

   We believe that this White-spotted Grouper grows to length of about 25 cm (10 inches).

Minimum Tank Length/Size:

   A minimum 60 gallon aquarium is recommended.

Water Movement: Weak, Moderate, Strong

   No special requirements.

Water Region: Top, Middle, Bottom

   No special requirements. Provide rockwork large enough for the fish to hide.


   This fish is available rarely.

Author: David Brough. CFS.
Lastest Animal Stories on White-spotted Grouper

Cindy Polson - 2012-03-24
I have a white spotted grouper he is sick, he hardley eats, he has a white film over his body. Also he has large white oval spots on him. What can I Do?

  • Jeremy Roche - 2012-03-24
    First have water tested. Quarantine grouper if you can. A lot of times if a fish is being bothered by parasites it will produce extra mucus on its body giving the white coating. Your fish needs to be treated for parasites or a fungal infection.
Glenn - 2009-10-17
Epinephelus Summanan White Spotted Grouper, grows to about 15 inches in the wild and in large enough aquariums. Nice specimen you have.

  • Nevea - 2011-11-09
    Stay with this guys, you're helping a lot of people.