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Lagoon damselfish

species of fish

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 21, 2026
Entity authorityQ3039485
Source-derived summary

The lagoon damselfish (Hemiglyphidodon plagiometopon), also known as the sweetlip damsel, is a species of ray-finned fish, a damselfish from the family Pomacentridae. It is a larger species of damselfish which is found in the Indo-Pacific where it occurs around branching corals in sheltered areas of reefs.

Description

The lagoon damselfish is a large brown species of damselfish, often the adults have a pale russet head and the colour of the fish gradually darkens towards the tail. There are pinkish markings on the operculum. The juveniles are dark blue to brownish on the head and near body and are yellow towards the tail and on the underside with a large iridescent blue eyespot on the dorsal fin, and blue bands and spots near the head on its body. They grow to a maximum length of 18 centimetres (7.1 in). Sometimes the only distinctive marking is a yellow eyering.

Distribution

The lagoon damselfish is found in the eastern Indian Ocean from Thailand through Indonesia, the Philippines and the Timor Sea into the western Pacific where it is found south to Australia and north to China and east to the Solomon Islands.

Habitat and biology

The lagoon damselfish is found in sheltered reefs and lagoons, often in areas of high turbidity and a silty substrate at the base of branching corals. They are found at depths of 1–20 metres (3–66 ft).

Editorial summary

Begin with the source’s own compact description: “Lagoon damselfish” is species of fish. The dossier treats that line as a proposition to test through Lagoon, damselfish and species, not as a finished interpretation.

Editorial reviewUseful for establishing the present vocabulary of the subject while preserving a route back to the evidence on which that vocabulary rests. The current 229-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. For this dossier, Lagoon, damselfish and species is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “species of fish” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated May 21, 2026. The linked authority identifier is Q3039485. None of the 0 selected statements returned an explicit reference.

Critical limits

Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.

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Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.

Three-step research path

  1. Establish the record: confirm the title “Lagoon damselfish”, its source revision and the description used here.
  2. Expand the search: follow Lagoon damselfish primary sources, Lagoon damselfish archive and Lagoon research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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Source & attribution

This entry incorporates text from Lagoon damselfish” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.