Double-lined fusilier (Pterocaesio digramma)

Classification (WoRMS)

Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Chordata · Class: Teleostei · Order: Eupercaria incertae sedis · Family: Caesionidae · Genus: Pterocaesio.

Accepted name: Pterocaesio digramma · Authority: (Bleeker, 1864) · Taxonomic status: accepted · AphiaID: 213657.

Synonyms and superseded combinations recorded for this taxon: Caesio diagramma Bleeker, 1864; Caesio digramma Bleeker, 1864; Pterocaesio diagramma (Bleeker, 1864); Pterocasesio digramma (Bleeker, 1864).

Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=213657 (CC BY 4.0). Accessed 2026-09-25.

Biology and life history (FishBase)

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

Maximum length: 30 cm · Depth range: 0–50 m · Habitat zone: reef-associated · Body shape: fusiform / normal · Vulnerability index: 20 of 100 · Fishery importance: commercial · Aquarium trade: never/rarely.

FishBase notes: Found in coastal areas, primarily around coral reefs (Ref. 402), turning bright red (Ref. 48636). Feed on zooplankton in midwater aggregations (Ref. 402). Oviparous, with numerous, small pelagic eggs (Ref. 402).

Source: FishBase species summary (SpecCode 933) — https://www.fishbase.se/summary/Pterocaesio-digramma.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-25.

Distribution and occurrence records (GBIF)

6,473 georeferenced occurrence records for Pterocaesio digramma are published through GBIF from 22 countries or marine areas. The map above plots 155 distinct locations from a sample of 3,000 records, omitting 14 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 (5,660); Chinese Taipei (179); Tonga (171); New Caledonia (137); Indonesia (92).

The full country table, WoRMS marine regions and the sampling notes are on this species' Distribution page.

Source: GBIF Occurrence Search (taxonKey 2374768) — https://www.gbif.org/occurrence/search?taxon_key=2374768&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=213657 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-25.

Conservation status (IUCN Red List)

The IUCN Red List assesses Pterocaesio digramma (Bleeker, 1864) 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 20252379) — https://www.iucnredlist.org/species/20252379/0; GBIF IUCN Red List category endpoint (taxonKey 2374768) — https://api.gbif.org/v1/species/2374768/iucnRedListCategory. Accessed 2026-09-25.

Description and natural history (Wikipedia)

The double-lined fusilier was first formally described as Caesio digramma in 1865 by the Dutch ichthyologist Pieter Bleeker with the type locality given as Ambon Island in Indonesia. In his 1987 review of the Caesionidae, Kent E. Carpenter placed this species within the subgenus Pisinnicaesio. The specific name digramma means 'two lined', a reference to the two yellow stripes on each side of the body, one on its back and one on its flanks.

Description

The double-lined fusilier has a fusiform and elongated body which is moderately laterally compressed. There are small conical teeth in the jaws and on the vomer and palatines. The dorsal fin contains 10 spines and 14–16 soft rays while the anal fin has three spines and 11–12 soft rays.

There are scales on both the dorsal and anal fins. There are 20–22 rays in the pectoral fins. This species attains a maximum total length of 30 cm. The overall colour is bluish-green lightening towards the lower body.

There are a pair of slender yellow stripes along the back and middle of the flank. The caudal fin lobes have dark tips. The more ventral yellow stripe is mainly underneath the lateral line, apart from the portion on the caudal peduncle.

Distribution and habitat

The double-lined fusilier is found in the Western Pacific Ocean where it occurs from Indonesia, Western Australia and New Caledonia to southern Japan. It has also been recorded off Norfolk Island and in Tonga. The record from Réunion is probably a mis-identified Pterocaesio marri. It occurs in coastal waters at depths down to 50 m, mainly around coral reefs.

Biology

Double-lined fusiliers feed on zooplankton in midwater where they gather in large schools. They are oviparous, laying many small pelagic eggs. Spawning takes place close to sunset when the spawning fish break away from the school, usually followed by "sneaker" males.

A male selects a female and starts to push at and nip at her belly before pushing her and then the pair start to swim in half circles around each other. This is when up to 15 sneaker males join in as it is now that the initial pair release eggs and sperm while belly-to-belly at the surface. The sneakers closest to the pair also release their sperm at this point; the pair and the sneakers then return to the school.

Fisheries

The double-lined fusilier is subjected to heavy fishing pressure in many parts of its range. They are caught using drive-in nets, gill nets and fish traps, as well as by illegal blast fishing. It can be an important food fish, being popular in the Philippines. The landings are sold fresh or preserved as salt fish.

The double-lined fusilier and other fusilier species are commonly eaten in Japan, where they are known as. Known as in Okinawan, it is the prefectural fish of Okinawa and particularly common in Okinawan cuisine, mostly commonly served deep-fried as kara-age. In English, it is sometimes called "banana fish", although this may also refer to other related species like Pterocaesio pisang.

Source: Wikipedia: Double-lined fusilier — https://en.wikipedia.org/wiki/Double-lined_fusilier (CC BY-SA 4.0). Accessed 2026-09-25.