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Diagnostic Description

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Juveniles overall black with scale centers bluish; white blotch on forehead and upper sides; all fins black except the transparent pectoral and outer portion of soft dorsal rays. Geographic and behavioral color of adults variable; no spot on forehead; spot on upper sides very reduced; head and fins normally black; scales with black margins. Margins of preorbital, suborbital and preoperculum finely serrated (Ref. 2746). Nuptial fish generally paler color. Body depth 1.4-1.6 in SL (Ref. 90102).
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Recorder
Estelita Emily Capuli
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Diseases and Parasites

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Turbidity of the Skin (Marine fish). Parasitic infestations (protozoa, worms, etc.)
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Allan Palacio
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Diseases and Parasites

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Bacterial Infections (general). Bacterial diseases
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Allan Palacio
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Life Cycle

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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). Courtship characterized by male 'signal-jumping'. Captive pair reported to spawn thrice monthly with a total of 17 over a 7-month period (Ref. 2856). While protogyny was originally proposed for this species, recent studies confirmed gonochorism in the form of non-functional hermaphroditism (Ref. 103751).
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Estelita Emily Capuli
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Morphology

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Dorsal spines (total): 12; Dorsal soft rays (total): 14 - 16; Analspines: 2; Analsoft rays: 14 - 15
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Trophic Strategy

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Inhabits coral and rocky reefs, juveniles often commensal with large sea anemones, sea urchins, or small coral heads (Ref. 4391, 48636). Also inhabits passes & outer reef environments up to at least 55 meters. Aggregations may number over 50 individuals (Ref. 2746). Juveniles associated with either branching corals or relatively large sea anemones (hiding place in case of danger), (Ref. 2746, 54301). Stomach contents include algae, copepods, and other planktonic crustaceans (Ref. 2746). It occurs in a variety of rocky and coral reef habitats, from shallow waters to at least 55 m depth (Ref. 54301). Diurnal species (Ref. 54980; 120737).
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Estelita Emily Capuli
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Biology

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Adults inhabit coral and rocky reefs, juveniles often commensal with large sea anemones, sea urchins, or small coral heads (Ref. 4391, 48636). They occur in small to large aggregations. Stomach contents include algae, copepods, and other planktonic crustaceans (Ref. 7247). 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). Diurnal species (Ref. 54980; 120737).
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Importance

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fisheries: minor commercial; aquarium: commercial; price category: unknown; price reliability:
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分布

provided by The Fish Database of Taiwan
分布於印度-西太平洋區,西起紅海、東非洲,東至夏威夷及馬貴斯群島,北到日本南部,南至澳洲。台灣分布於南部、北部、澎湖、小琉球、蘭嶼及綠島等沿岸礁區。
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臺灣魚類資料庫
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利用

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本身體色豔麗以及與海葵共生之習性,使其成為受歡迎之水族觀賞魚。
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描述

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體呈圓形而側扁,標準體長為體高之1.4-1.6倍。吻短而鈍圓。口中型;兩頜齒小而呈圓錐狀,靠外緣之齒列漸大且齒端背側有不規則之絨毛帶。眶前骨具鱗,眶下骨具鱗,下緣具鋸齒;前鰓蓋骨後緣多少呈鋸齒。體被櫛鱗;側線之有孔鱗片17-20個。鰓耙數23-25。背鰭單一,軟條部不延長而呈角形,硬棘XII,軟條14-16;臀鰭硬棘II,軟條13-15;胸鰭鰭條18-21;尾鰭內凹形,上下葉末端略呈圓形。體色呈暗褐色到黑色;體側中央兩側具一淡色斑點,頭背上另有一淡色斑點。幼魚時體色暗,斑點泛白;隨著成長,體色漸淡,斑點亦變淡,甚至消失。
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棲地

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主要棲息於岩礁及珊瑚礁區,棲息深度在1-55公尺左右。幼魚常與小丑魚一起與海葵、海膽共生或在珊珊叢中棲息,成長後以珊瑚礁為主要棲息場所。領域性極強,在警戒或交配時,體色會轉變成灰白色。主要以小蝦、小蟹、藻類及浮游動物為食。
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Threespot dascyllus

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The threespot dascyllus (Dascyllus trimaculatus), also known as the domino damsel or simply domino, is a species of damselfish from the family Pomacentridae. It is native to the Indo-Pacific from the Red Sea and East Africa, to the Pitcairn Islands, southern Japan, and Australia, and can also be found in some parts of the Philippines.[2] Its grey to black body has two lateral white spots and one between the eyes like domino hence the name; the threespot dascyllus grows up to 13 cm in length. Coloration is somewhat variable; the spot on the forehead may be absent and the lateral spots very much reduced. It feeds on algae, copepods and other planktonic crustaceans.[3]

Habitat

Generally, adults are found in small groups around coral heads or large rocks. Juveniles may be found associated with large sea anemones or sheltering between the spines of diadema sea urchins or branching corals.[4] This species may be found to depths of 55 m.

Etymology

Trimaculatus, meaning "three-spotted", refers to the fish's three white spots. This accounts also for the common name "domino".[5]

Gallery

In aquarium

During the juvenile period, they live with the sea anemone. They grow fast and can grow up to 14 cm in length in a large fish tank. People who like big fish may raise a pair of small Threespot to observe their growth.[6]

References

  1. ^ "Dascyllus trimaculatus https://www.iucnredlist.org/species/188339/57215444#assessment-information". IUCN Red List of Threatened Species. {{cite journal}}: External link in |title= (help)no identifier
  2. ^ Froese, Rainer; Pauly, Daniel (eds.) (2007). "Dascyllus trimaculatus" in FishBase. 5 2007 version.
  3. ^ Allen, G.R., 1991. Damselfishes of the world. Mergus Publishers, Melle, Germany. 271 p.
  4. ^ Lieske, E. and Myers, R.F. (2004) Coral reef guide; Red Sea London, HarperCollins ISBN 0-00-715986-2
  5. ^ Siliotti, A. (2002) fishes of the red sea Verona, Geodia ISBN 88-87177-42-2
  6. ^ Youtube <> Creatures section, Damselfish - Author:Sublanding Fish[2020-06-19]
Wikimedia Commons has media related to Dascyllus trimaculatus.
Wikispecies has information related to Dascyllus trimaculatus.

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Threespot dascyllus: Brief Summary

provided by wikipedia EN

The threespot dascyllus (Dascyllus trimaculatus), also known as the domino damsel or simply domino, is a species of damselfish from the family Pomacentridae. It is native to the Indo-Pacific from the Red Sea and East Africa, to the Pitcairn Islands, southern Japan, and Australia, and can also be found in some parts of the Philippines. Its grey to black body has two lateral white spots and one between the eyes like domino hence the name; the threespot dascyllus grows up to 13 cm in length. Coloration is somewhat variable; the spot on the forehead may be absent and the lateral spots very much reduced. It feeds on algae, copepods and other planktonic crustaceans.

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Description

provided by World Register of Marine Species
Inhabits coral and rocky reefs, juveniles often commensal with large sea anemones (@Amphiprion@) (Ref. 1602). Occurs in lagoon and outer reef environments, in small to large aggregations. The stomach of several specimens from the Palau Islands contained algae, copepods, and other planktonic crustaceans.

Reference

Froese, R. & D. Pauly (Editors). (2023). FishBase. World Wide Web electronic publication. version (02/2023).

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