Duncker's pipefish (Halicampus dunckeri)

Classification (WoRMS)

Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Chordata · Class: Teleostei · Order: Syngnathiformes · Family: Syngnathidae · Genus: Halicampus.

Accepted name: Halicampus dunckeri · Authority: (Chabanaud, 1929) · Taxonomic status: accepted · AphiaID: 218013.

Synonyms and superseded combinations recorded for this taxon: Micrognathus dunckeri Chabanaud, 1929.

Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=218013 (CC BY 4.0). Accessed 2026-09-23.

Biology and life history (FishBase)

Measured values published by FishBase for Halicampus dunckeri. Only fields the database actually holds for this species are shown; these are database values, not aquarium guidance.

Maximum length: 15 cm · Depth range: 5–25 m · Habitat zone: reef-associated · Body shape: eel-like · Vulnerability index: 10 of 100.

FishBase notes: Collected from sand, rubble, or reef habitats to a depth of at least 14 m. Ovoviviparous (Ref. 205). The male carries the eggs in a brood pouch which is found under the tail (Ref. 205). Also found in coastal algal-rubble slopes in 5-25 m (Ref 90102).

Source: FishBase species summary (SpecCode 5974) — https://www.fishbase.se/summary/Halicampus-dunckeri.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-23.

Distribution and occurrence records (GBIF)

78 georeferenced occurrence records for Halicampus dunckeri are published through GBIF from 18 countries or marine areas. The map above plots 43 distinct locations from a sample of 78 records, omitting 10 inland records that carry an institution's coordinates rather than a collection site; it shows where the species has been observed and reported, not a modelled range.

Most records by country or area: Australia (17); Indonesia (17); Philippines (7); Japan (5); New Caledonia (5); Jordan (4); Papua New Guinea (4); Marshall Islands (3); Palau (3); Egypt (2); Micronesia (Federated States of) (2); Kenya (2); South Africa (2); Mauritius (1); Solomon Islands (1).

Marine regions with a valid WoRMS distribution record: South Africa (country).

Source: GBIF Occurrence Search (taxonKey 2332848) — https://www.gbif.org/occurrence/search?taxon_key=2332848&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=218013 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.

Conservation status (IUCN Red List)

The IUCN Red List assesses Halicampus dunckeri (Chabanaud, 1929) as Least Concern (code LC). No trend, population estimate or threat analysis is given here, because none is available from this source without the Red List API; follow the source link for the full assessment, including its date.

Source: IUCN Red List of Threatened Species (taxon 65367574) — https://www.iucnredlist.org/species/65367574/0; GBIF IUCN Red List category endpoint (taxonKey 2332848) — https://api.gbif.org/v1/species/2332848/iucnRedListCategory. Accessed 2026-09-23.

Description and natural history (Wikipedia)

The Duncker's pipefish is a small sized fish that can reach a maximum length of 15 cm. It has a thin and elongate body with reduced fins which are difficult to observe. The body color is highly variable from one individual to another ranging from creamy white to dark brown through redish to yellowish.

The dorsal part of the body is full of small whitish skin growths as well as irregular pale bars.

Its head is rather small with large eyes, the snout is short with a characteristic whitish part at its tip.

The ridgenose pipefish is widespread throughout the tropical and subtropical waters of the Indo-West Pacific from the eastern coast of Africa, Red Sea included, until Salomon Islands and from South Japan to the Great Barrier Reef.

The ridgenose pipefish is found close to the bottom between the surface and 25 meters deep.

It prefers areas such as reef, sandy bottom or coral rubble with algae or debris in which it can easily hide.

Like many of their congeners belonging to the family of Pipefishes, the Duncker's pipefish has a benthic lifestyle and is ovoviviparous.

Its reproduction occurs during a courtship where the female will transfer her eggs in the ventral surface of the male between skin folds forming a kind of protective pouch in which he will fertilize them and protect them during the incubation period.

The Duncker's pipefish is a carnivore. Its diet is based on small crustaceans and other invertebrates which it aspires through its tubular snout.

The fish is named in honor of ichthyologist Georg Duncker (1870-1953), of the Zoological Museum Hamburg, who revised the pipefish family in 1915.

Source: Wikipedia: Halicampus dunckeri — https://en.wikipedia.org/wiki/Halicampus_dunckeri (CC BY-SA 4.0). Accessed 2026-09-23.