Whitebonnet anemonefish (Amphiprion leucokranos)

Classification (WoRMS)

Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Chordata · Class: Teleostei · Order: Ovalentaria incertae sedis · Family: Pomacentridae · Genus: Amphiprion.

Accepted name: Amphiprion leucokranos · Authority: Allen, 1973 · Taxonomic status: accepted · AphiaID: 278396.

Synonyms and superseded combinations recorded for this taxon: Amphiprion leucokranus Allen, 1973.

Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=278396 (CC BY 4.0). Accessed 2026-09-25.

Biology and life history (FishBase)

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

Maximum length: 12 cm · Depth range: 2–12 m · Habitat zone: reef-associated · Body shape: fusiform / normal · Vulnerability index: 10 of 100 · Fishery importance: commercial · Aquarium trade: commercial.

FishBase notes: Adults inhabit lagoons and outer reef slopes. Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).

This species may be a hybrid between A. chrysopterus and A. sandaracinos . A. thiellei may be a similar hybrid (Ref. 90102). Associated with the anemones: Heteractis crispa , Heteractis magnifica , and Stichodactyla mertensii (Ref. 5911). Has been reared in captivity (Ref. 35420).

Source: FishBase species summary (SpecCode 9207) — https://www.fishbase.se/summary/Amphiprion-leucokranos.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-25.

Distribution and occurrence records (GBIF)

63 georeferenced occurrence records for Amphiprion leucokranos are published through GBIF from 4 countries or marine areas. The map above plots 17 distinct locations from a sample of 63 records, omitting 3 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: Solomon Islands (44); Papua New Guinea (14); Indonesia (4); Malaysia (1).

Source: GBIF Occurrence Search (taxonKey 5212079) — https://www.gbif.org/occurrence/search?taxon_key=5212079&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=278396 (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 Amphiprion leucokranos Allen, 1973 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 188501) — https://www.iucnredlist.org/species/188501/0; GBIF IUCN Red List category endpoint (taxonKey 5212079) — https://api.gbif.org/v1/species/5212079/iucnRedListCategory. Accessed 2026-09-25.

Description and natural history (Wikipedia)

The body of A. leucokranosis is orange or light brown and with a white head bar and a white mark on the top of its head, giving rise to its common name of white bonnet anemonefish. The head band may be continuous or not. They have 9 dorsal spines, 2 anal spines, 18-19 dorsal soft rays and 13-14 anal soft rays. They reach a maximum length of 11 cm.

Hybridisation

There has been a long-standing theory that A. leucokranosis was a naturally occurring hybrid between A. chrysopterus and A. sandaracinos, with the fish being experimentally created in captivity. Its hybrid status was confirmed in 2015 with consistent ecological, morphological and genetic evidence.

In any group of anemonefish, there is a strict sized based dominance hierarchy: the female is largest, the breeding male is second largest, and the male non-breeders get progressively smaller as the hierarchy descends. They exhibit protandry, meaning the breeding male will change to female if the sole breeding female dies, with the largest non-breeder becomes the breeding male.

This strict sized based dominance hierarchy makes the relative size of the parent species critical in shaping the outcome of hybridization In this regard A. chrysopterus is one of the largest anemonefish, growing to 17 cm in length. while A. sandaracinos is significantly smaller growing up to 11 cm as a female and just 3 to 6.5 cm as a male. There is strong evidence, consistent with their relative size, of the larger A. chrysopterus always being the mother and unidirectional introgression of A. chrysopterus mitochondrial DNA into A. sandaracinos via hybrid backcrosses.

Color variations

Being a hybrid A. leucokranosis shows a variety of colors and patterns, with the intermediate morphology of the typical F1 hybrid and backcrosses tending more towards the features of A. sandaracinos. It does not show any melanism when hosted by S. mertensii unlike some species of anemonefish, such as A.

Similar species

The white mark on top of the head is distinctive. The parent A. sandaracinos has a similar body color, however it has a white stripe on the dorsal ridge from the superior lip to the caudal fin and lacks the white bar on the side of the head.

Distribution and habitat

Other constraints upon hybridization are overlap in distribution, depth and host anemone. A. leucokranos is found in the Western Central Pacific, on the north coast of New Guinea, including Manus Island, D'Entrecasteaux Islands and New Britain and the Solomon Islands, being the area where the distribution of A. chrysopterus and A. sandaracinos overlap. There is a substantial overlap in depth with all 3 fish found in the range of 1–10 m.

A. leucokranos is hosted by the following species of anemone:

Stichodactyla mertensii Mertens' carpet sea anemone

At Kimbe Bay A. leucokranos and its parents were primarily found in the host Stichodactyla mertensii otherwise Heteractis crispa.

Source: Wikipedia: Amphiprion leucokranos — https://en.wikipedia.org/wiki/Amphiprion_leucokranos (CC BY-SA 4.0). Accessed 2026-09-25.