Janss' pipefish (Doryrhamphus janssi)

Classification (WoRMS)

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

Accepted name: Doryrhamphus janssi · Authority: (Herald & Randall, 1972) · Taxonomic status: accepted · AphiaID: 279103.

Synonyms and superseded combinations recorded for this taxon: Dentirostrum janssi Herald & Randall, 1972; Doryramphus janssi (Herald & Randall, 1972); Dunckerocampus janssi (Herald & Randall, 1972).

Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=279103 (CC BY 4.0). Accessed 2026-09-23.

Biology and life history (FishBase)

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

Maximum length: 14 cm · Depth range: 0–35 m · Habitat zone: reef-associated · Body shape: eel-like · Vulnerability index: 10 of 100.

FishBase notes: Found in tide pools and reef crevices. Also found in sheltered inner reefs, usually in caves with sponges and below large plate corals. Ovoviviparous (Ref. 205). The male carries the eggs in a brood pouch which is found under the tail (Ref. 205). Very active cleaner and has cleaning station that is visited by apogonids and damsels where adults work in pairs (Ref. 48635). Minimum depth from Ref. 58018. Solitary or in pairs (Ref 90102).

Source: FishBase species summary (SpecCode 5970) — https://www.fishbase.se/summary/Doryrhamphus-janssi.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-23.

Distribution and occurrence records (GBIF)

94 georeferenced occurrence records for Doryrhamphus janssi are published through GBIF from 12 countries or marine areas. The map above plots 46 distinct locations from a sample of 94 records, omitting 9 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: Thailand (23); Australia (19); Indonesia (17); Philippines (13); Palau (11); Solomon Islands (3); Malaysia (2); Viet Nam (2); Papua New Guinea (1); Singapore (1); Timor-Leste (1); Chinese Taipei (1).

Source: GBIF Occurrence Search (taxonKey 2332772) — https://www.gbif.org/occurrence/search?taxon_key=2332772&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=279103 (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 Doryrhamphus janssi (Herald & Randall, 1972) 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 155073) — https://www.iucnredlist.org/species/155073/0; GBIF IUCN Red List category endpoint (taxonKey 2332772) — https://api.gbif.org/v1/species/2332772/iucnRedListCategory. Accessed 2026-09-23.

Description and natural history (Wikipedia)

Doryrhamphus janssi has a long, slender body with an elongated, tubular mouth. It's a small sized fish which can reach a maximal length of 14 cm. The body of this species is bright orange while the head and anterior portion of the trunk are blue.

Its tail is flag-like with a black background color, white margin and white dot in the center.

The Janss' pipefish is found in the tropical waters of the central Indo-Pacific area, from Indonesia to the Philippines, this latter is the northern and eastern limit of the species distribution.

It likes sheltered inner reef and it is usually observed under small coral overhangs and crevices.

Doryrhamphus janssi is a cleaner fish specialised in small fish like apogonids and damselfishes, they usually work in couple.

It is ovoviviparous and like for the seahorse, the male carries the eggs in a brood pouch.

The Janss' Pipefish is not easily kept because of to its unusual feeding requirements. This fish generally prefers to eat only live copepods.

The specific name honours Edwin Janns Jr., a Los Angeles property developer who had a keen interest in marine biology.

Source: Wikipedia: Doryrhamphus janssi — https://en.wikipedia.org/wiki/Doryrhamphus_janssi (CC BY-SA 4.0). Accessed 2026-09-23.