Australian blackspot shark
species of fish

The Australian blackspot shark or Coates's shark (Carcharhinus coatesi) is a species of requiem shark found off northern Australia (from Shark Bay in Western Australia to K'gari in Queensland) and possibly also off the coast of New Guinea. It belongs to a species complex of blackspot sharks in the family Carcharhinidae. These sharks are not widely studied due to their cryptic nature, but there was a recent reclassification distinguishing it from the whitecheek shark (Carcharhinus dussumieri) and the blackspot shark (Carcharhinus sealei) in 2012. Much of the existing literature predates this reclassification and groups the Australian blackspot shark with the aforementioned closely related species.
Description
The Australian blackspot shark is a small inshore shark. At birth, they range from 38–40 cm (15–16 in) in length. The mature size for both sexes is approximately 70 cm or 28 in. The maximum size recorded is 88 cm or 35 in. They have two dorsal fins, triangular pectoral fins, paired pelvic fins, an anal fin, and a heterocercal caudal fin. The second dorsal has a dark to black tip and all other fins are plain.
Begin with the source’s own compact description: “Australian blackspot shark” is species of fish. The dossier treats that line as a proposition to test through Australian, blackspot and shark, not as a finished interpretation.
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.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Aug 5, 2026. The linked authority identifier is Q1035604. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2012.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. 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.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Australian blackspot shark”, its source revision and the description used here.
- Expand the search: follow Australian blackspot shark primary sources, Australian blackspot shark archive and Australian research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Australian blackspot shark”?
- Which observation, specimen, dataset or publication supports the account?
- Is the terminology current, historical or disputed?
Search terms from this dossier
This entry incorporates text from “Australian blackspot shark” 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.