''Apolemichthys griffisi'', or Griffis angelfish, is a species of

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

, a marine angelfish belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Pomacanthidae Marine angelfish are perciform fish of the family Pomacanthidae. They are found on shallow reefs in the tropical Atlantic, Indian, and mostly western Pacific Oceans. The family contains seven genera and about 86 species. They should not be co ...

. It is found in the

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ...

Ocean. It is a rarity for the species to enter the aquarium trade.

Description

''Apolemichthys griffisi'' has a rather greyish white or ash coloured body with a wide. black band extending from the head as far as the ventral part of the caudal peduncle, within this lies a contrasting white band. There is a large black spot on the head above the eye. The

dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found ...

is largely black and the

anal Anal may refer to: Related to the anus *Related to the anus of animals: ** Anal fin, in fish anatomy ** Anal vein, in insect anatomy ** Anal scale, in reptile anatomy *Related to the human anus: ** Anal sex, a type of sexual activity involving ...

and

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hi ...

s are white. The juveniles lack the white stripe within the black band. The dorsal fin contains 14 spines and 18 soft rays while the anal fin has 3 spines and 18 soft rays. This species attains a maximum

total length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured f ...

of .

Distribution

''Apolemichthys griffisi'' has a wide distribution which extends from Southeast Asia east to the

Line Islands The Line Islands, Teraina Islands or Equatorial Islands () are a chain of 11 atolls (with partly or fully enclosed lagoons, except Vostok and Jarvis) and coral islands (with a surrounding reef) in the central Pacific Ocean, south of the Hawa ...

, where it has been recorded with certainty from

Kiribati Kiribati, officially the Republic of Kiribati, is an island country in the Micronesia subregion of Oceania in the central Pacific Ocean. Its permanent population is over 119,000 as of the 2020 census, and more than half live on Tarawa. The st ...

and maybe the US Islands. The distribution is known to include Indonesia, Kiribati,

Nauru Nauru, officially the Republic of Nauru, formerly known as Pleasant Island, is an island country and microstate in the South Pacific Ocean. It lies within the Micronesia subregion of Oceania, with its nearest neighbour being Banaba (part of ...

, the Solomon Islands and Papua New Guinea.

Habitat & biology

''Apolemichthys griffisi'' is a species of the outer coral reef slopes, rocky ledges and drop-offs. It is normally recorded as solitary individuals, pairs or in small aggregations. It is found at depths of . it feeds on benthic invertebrates such as

sponge Sponges or sea sponges are primarily marine invertebrates of the animal phylum Porifera (; meaning 'pore bearer'), a basal clade and a sister taxon of the diploblasts. They are sessile filter feeders that are bound to the seabed, and a ...

tunicates Tunicates are marine invertebrates belonging to the subphylum Tunicata ( ). This grouping is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates). The subphylum was at one time ...

and

crustaceans Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of Arthropod, arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquat ...

. It is a

protogynous hermaphrodite Sequential hermaphroditism (called dichogamy in botany) is one of the two types of hermaphroditism, the other type being simultaneous hermaphroditism. It occurs when the organism's sex changes at some point in its life. A sequential hermaphrodite ...

and there is no

sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ...

Systematics

''Apolemichthys griffisi'' Was first formally described in 1981 as ''Holacanthus griffisi'' by Bruce Carlson and Leighton R. Taylor with the type locality given as

Canton Island Canton Island (also known as Kanton or Abariringa), previously known as Mary Island, Mary Balcout's Island or Swallow Island, is the largest, northernmost, and , the sole inhabited island of the Phoenix Islands, in the Republic of Kiribati. It i ...

one of the northern

Phoenix Islands The Phoenix Islands, or Rawaki, are a group of eight atolls and two submerged coral reefs that lie east of the Gilbert Islands and west of the Line Islands in the central Pacific Ocean, north of Samoa. They are part of the Kiribati, Republic ...

in the South Pacific. Its

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

honours Nixon Griffis (1917–1993), a conservationist who was trustee of the

New York Zoological Society New or NEW may refer to: Music * New, singer of K-pop group The Boyz * ''New'' (album), by Paul McCartney, 2013 ** "New" (Paul McCartney song), 2013 * ''New'' (EP), by Regurgitator, 1995 * "New" (Daya song), 2017 * "New" (No Doubt song), 1 ...

and a patron of the

New York Aquarium The New York Aquarium is the oldest continually operating Public aquarium, aquarium in the United States, located on the Riegelmann Boardwalk in Coney Island, Brooklyn, New York City. It was founded at Castle Garden in Battery Park, Manhattan, i ...

, and supported the Carlson and Taylor's collecting trip to Canton Island on which this species was discovered. Within the

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

Apolemichthys ''Apolemichthys'' is a genus of marine angelfishes in the family (biology), family Pomacanthidae. Species Fishbase still has ''Apolemichthys armitagei'' listed as a species within this genus but notes that it is a Hybridisation (biology), hyb ...

'' this species seems to be more closely related to '' A. xanthotis'' and '' A. xanthurus'' of the Indian Ocean.

Utilisation

''Apolemichthys griffisi'' is apparently rare in the

aquarium An aquarium (: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. fishkeeping, Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquati ...

trade (is reported to be rarely exported through the aquarium trade). Most of the specimens in the trade are collected from

Kiritimati Kiritimati (), also known as Christmas Island, is a Pacific Ocean atoll in the northern Line Islands. It is part of the Republic of Kiribati. The name is derived from the English word "Christmas" written in Gilbertese according to its phonol ...

, Kiribati. It is reported to be one of the most expensive fishes in the trade.

References

Sources

* Helmut Debelius, Rudie H. Kuiter, ''World Atlas of Marine Fishes'', Hollywood Import & Export, Inc., 2006 * Mark Allen, Roger Steene, Gerald R. Allen, ''A Guide to Angelfishes and Butterflyfishes'', Odyssey Publishing. 1998
Setup Brough, Clarice. ''Griffis Angelfish'' Animal-World. Online.
Clarice Brough {{Taxonbar, from=Q2462473 griffisi Taxa named by Bruce A. Carlson Taxa named by Leighton R. Taylor Fish described in 1981