three-lined monocle bream

Scientific name Scolopsis trilineata
Descriptor Kner
Year of description 1868
IUCN category LC
Family Nemipteridae
Genus Scolopsis
Scolopsis trilineata Scolopsis trilineata


Scolopsis trilineata, commonly known as three-lined monocle bream, is a salt water fish.

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Who is it?

Genus Scolopsis

In 2023, the genus Scolopsis comprises 18 species recorded in the tropical and subtropical regions of the Indian and Pacific Oceans. These fish, often referred to as "Scolopsis" generically, display a variety of appearances and habitats.

Scolopsis are opportunistic predators that primarily feed on benthic invertebrates (polychaetes, brittle stars, aquatic worms, and small crustaceans). Juvenile fish feed during the day, while adults exhibit nocturnal habits and primarily hunt at night. During the day, adults hide, venturing out to forage above sandy banks.

Their body shape is oval, with several species featuring a diagonal band that separates the typically white belly from the patterns on the upper part of their bodies.

Different species of Scolopsis occupy a range of habitats, from mangroves to coral reefs. Some are found in shallow waters near coastlines, while others prefer deeper reef areas.

Many Scolopsis species are categorized as protogynous hermaphrodites, meaning they are born as females and can transition to males as they grow. However, there are variations and exceptions to this pattern, and not all females necessarily change their sex.

As of now, none of the Scolopsis species are considered threatened. Although Scolopsis bilineata occasionally appears in small numbers at local fish markets, there is no targeted fishery for them. Live specimens are sometimes captured for the aquarium trade.


  • Average size
    14 cm
  • Maximum size
    25 cm
  • Pattern
    diagonal stripes
  • Average size
    14 cm
  • Maximum size
    25 cm
  • Pattern
    diagonal stripes

How to recognize the three-lined monocle bream ?

The three-lined monocle bream measures between 14 and 25 cm. This fish is bicolore with a predominantly marron and blanc body. The also has marron diagonal stripes.

Behaviour & Life cycle

  • diet
  • Sociability
    living in a group or alone
  • territorial
  • Way of living

The three-lined monocle bream is a fish living in a group or alone naturally found at mid-depth and near the bottom. This species is carnivorous . This fish lives mainly at night. Usually, it leaves its hiding place and starts to be active once it gets dark.

Although the three-lined monocle bream is non-territorial, it is sometimes aggressive towards other species.


  • Reproduction
    ovipare qui pond en eau libre
  • Hermaphrodite

The three-lined monocle bream is a fish ovipare qui pond en eau libre. always born female. Growing up, individuals will change sex to become male, this is called successive hermaphroditism of the protogynous type.

Harmless species

This species does not represent any particular threats to humans when encountered in its natural environment.

Where to find it?

Where to see this species?

What is its habitat?

Natural environment characteristics

  • Temperature
    26 - 30 °C
  • Depth
    1 - 20 m

Biotope presentation

The three-lined monocle bream is most often found at a depth between 1m and 20m. However, it is not impossible to find this species at other depths.

Species of the same biotope

To go further

To read on the web

Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.

Benoit Chartrer

Benoit Chartrer


Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

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Where to see this species?

Same genus

Species of the same biotope

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