Lophius americanus
species of fish

Lophius americanus is a goosefish in the family Lophiidae, also called all-mouth, American anglerfish, American monkfish, bellows-fish, devil-fish, headfish, molligut, satchel-mouth, or wide-gape. It is native to the eastern coast of North America.
Description
The American anglerfish is unique in its appearance and has no relatives with which it can be confused in the areas where it is caught. A fish of lesser importance than other food fish in the region, such as cod, its various names suggest its unusual appearance - a very large mouth, more than twice the width of the tail, with several spines and strong teeth, enabling it to snare prey larger than itself. The body is flattened dorsoventrally to allow it to hide on the sea floor. The front of the head carries erectile spines, the primary of which has a flattened end to resemble a small organism or piece of algae. The pectoral fins are like wide fans behind the head, and the pelvic fins are like small hands below the head.
The American anglerfish can grow to a length of 140 cm (55 in), but 100 cm (39 in) is a more usual size. The greatest recorded weight is 22.6 kg (50 lb) and the greatest recorded age is 30 years.
Distribution and habitat
The American anglerfish is found in the western Atlantic from Newfoundland and Quebec south to northern Florida, but is commoner in the more northerly parts of its range, north of Cape Hatteras.
Begin with the source’s own compact description: “Lophius americanus” is species of fish. The dossier treats that line as a proposition to test through Lophius, americanus and species, 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.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Aug 23, 2026. The linked authority identifier is Q1755989. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. 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.
- 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 “Lophius americanus”, its source revision and the description used here.
- Expand the search: follow Lophius americanus primary sources, Lophius americanus archive and Lophius 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 “Lophius americanus”?
- Has classification or technical consensus changed since the cited source?
- Is the terminology current, historical or disputed?
Search terms from this dossier
This entry incorporates text from “Lophius americanus” 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.