Body Color Variations of Sweetlip Fish (Lethrinus spp.) from Various Habitats in Indonesian Waters

By. Amma - 06 Nov 2025

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lautnusantara.com The body color of the Sweetlip (Lethrinus spp.) varies depending on the species, age, and environment in which it lives, but generally has a distinctive, easily recognizable pattern. Here's a detailed explanation:

Body Color of the Sweetlip (General)

  • Upper body (dorsal): bluish-gray, greenish-green, or brownish.
  • Lower body (belly): silvery-white or light grayish.
  • Head: Often has a pinkish or yellowish tinge on the cheeks and around the mouth.
  • Fins: Generally reddish, yellowish, or light orange, especially the caudal and dorsal fins.
  • Body Markings: Some species have fine spots or faint markings on the sides, especially the spotted rainbow trout (Lethrinus ornatus).

Color Examples by Species

1. Red rainbow trout (Lethrinus lentjan)

  • Silvery-pink base color.
  • Doral and caudal fins are bright red.
  • Eyes are yellowish with red edges.

2. Stone badgers (Lethrinus nebulosus)

  • Bluish-gray body with dark spots.
  • Yellowish or brownish fins.
  • Appears paler than other species.

3. Spotted badgers (Lethrinus ornatus)

  • Silver body with small dark spots on the sides.
  • Doral and caudal fins are reddish-yellow.

4. White badgers (Lethrinus harak)

  • Plain silvery body with no distinct pattern.
  • Transparent fins with a yellow tinge.

Factors Affecting Color

  • Habitat environment: Fish living on sandy reefs tend to be pale in color, while those living on dense coral or algae are darker.
  • Age and condition of the fish: Young fish are brighter; older or stressed fish may experience faded colors.
  • Light and water depth: Color appears to change depending on the light intensity in the ocean.

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