CACrown ArchivesThe cinema collection
Menu
Research dossier · Science & Nature

Dark-shouldered snake eel

species of fish

Specimen drawers, botanical folios and brass scientific instruments under study light
Science and natureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 8, 2021
Entity authorityQ2408387 ↗
Source-derived summary

The dark-shouldered snake eel (Ophichthus cephalozona, also known commonly as the headsaddle snake eel, the black-neck snake eel, the blacksaddle snake eel, or the one-banded snake-eel) is an eel in the family Ophichthidae (worm/snake eels). It was described by Pieter Bleeker in 1864. It is a tropical, marine eel which is known from the Pacific Ocean, including the East Indies, the Society Islands, the Mariana Islands, Queensland, the Marshall Islands, Micronesia, Japan, and India. It dwells at a depth range of 2–15 metres, and inhabits reefs. It forms burrows in mud and sand, and forages during the night. Males can reach a maximum total length of 115 centimetres.

The dark-shouldered snake eel is of no commercial interest to fisheries, but is sometimes caught in nets in the Ryukyu Islands.

Editorial summary

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

Editorial reviewA practical orientation to terminology and classification, particularly when read beside dated observations, specimens or technical literature. The current lead gives the account dated anchors—1864—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Dark-shouldered, snake 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 Apr 8, 2021. The linked authority identifier is Q2408387. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1864.

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.

Best used for
  • Current terminology
  • Classification context
  • Finding cited technical literature
Verify next

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

Three-step research path

  1. Establish the record: confirm the title “Dark-shouldered snake eel”, its source revision and the description used here.
  2. Expand the search: follow Dark-shouldered snake eel primary sources, Dark-shouldered snake eel archive and Dark-shouldered 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

  1. Which source most directly establishes the central claim about “Dark-shouldered snake eel”?
  2. Which observation, specimen, dataset or publication supports the account?
  3. Is the terminology current, historical or disputed?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “Dark-shouldered snake eel” 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.