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Diagnostic Description

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Superior trunk and tail ridges discontinuous; inferior trunk ridge ending on anal ring; lateral trunk ridge continuous with inferior tail ridge; body rings 16; tail rings 21-23.Description: Characterized by blue head and tail sections; middle portion of body covered by broad area of orange; tail black with white margin and center portion; length of snout 1.5-1.8 in head length; depth of snout 7.6-12.6 in snout length; head length 4.2-5.2 in SL (Ref. 90102).
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Recorder
Cristina V. Garilao
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Life Cycle

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Male carries the eggs in a brood pouch (Ref. 205).
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Susan M. Luna
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Morphology

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Dorsal spines (total): 0; Dorsal soft rays (total): 22 - 25; Analsoft rays: 4
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Cristina V. Garilao
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Trophic Strategy

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Found in tide pools and reef crevices. Also found in sheltered inner reefs, usually in caves with sponges and below large plate corals. Very active cleaner and has cleaning station that is visited by apogonids and damsels where adults work in pairs (Ref. 48635), may also be solitary (Ref 90102).
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Estelita Emily Capuli
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Biology

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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).
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Estelita Emily Capuli
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分布

provided by The Fish Database of Taiwan
分布於中西太平洋區,自泰國灣到索羅門群島,北至菲律賓、臺灣, 南至澳洲昆士蘭省。臺灣發現於南部。
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臺灣魚類資料庫
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利用

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小型魚類,偶為潛水捕獲,除學術研究及水族觀賞外,不具食用價值。
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描述

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體特別的延長和纖細,無鱗,由一系列的骨環所組成;軀幹部的上側稜與尾部上側稜不相連接,下側稜則止於臀部骨環附近而不與尾部相接,中側稜則與尾部下側稜相接。吻長略長於後頭部;吻部背中稜完全,兩側則棘列。主鰓蓋具一完全的中縱稜。體環無弱縱棘;無皮瓣。骨環 16 + 21-23;背鰭鰭條數 22-25;胸鰭鰭條數 18-22;尾鰭鰭條數 10。體中部呈橘褐色,頭部及尾部深藍色。尾鰭黑色,中央具白色斑塊。
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棲地

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主要棲息於潮池與礁石裂隙中,也發現於掩蔽的岩礁內側,通常在大片的珊瑚下方而有海綿的洞穴附近。是非常活躍的清潔工,且有清潔站,天竺鯛與雀鯛常拜訪的地方,通常由成魚成對在那裡工作。
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Doryrhamphus janssi

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Doryrhamphus janssi, commonly known as the Janss' pipefish , is a species of pipefish belonging to the family Syngnathidae.

Description

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.[3] 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.

Distribution & habitat

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.[2] It likes sheltered inner reef and it is usually observed under small coral overhangs and crevices.[4]

Biology

Doryrhamphus janssi is a cleaner fish specialised in small fish like apogonids and damselfishes, they usually work in couple.[3]

It is ovoviviparous and like for the seahorse, the male carries the eggs in a brood pouch.[4]

Captivity

The Janss' Pipefish is not easily kept because of to its unusual feeding requirements. This fish generally prefers to eat only live copepods.[5]

Name

The specific name honours Edwin Janns Jr., a Los Angeles property developer who had a keen interest in marine biology.[6]

References

  1. ^ Pollom, R. (2017). "Doryrhamphus janssi". The IUCN Red List of Threatened Species. 2017: e.T155073A67621213. doi:10.2305/IUCN.UK.2017-2.RLTS.T155073A67621213.en.
  2. ^ a b Froese, Rainer; Pauly, Daniel (eds.) (2018). "Doryrhamphus janssi" in FishBase. February 2018 version.
  3. ^ a b Kuiter, R.H. & T. Tonozuka (2001). Pictorial guide to Indonesian reef fishes. Part 1. Eels- Snappers, Muraenidae - Lutjanidae. Zoonetics, Australia. p. 302.
  4. ^ a b Breder, C.M. & D.E. Rosen (1966). Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. p. 941.
  5. ^ Peteducation.com Archived February 2, 2010, at the Wayback Machine
  6. ^ Herald, E. S.; J. E. Randall (1972). "Five new Indo-Pacific pipefishes". Proceedings of the California Academy of Sciences. Series 4. 39 (11): 121–140.

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Doryrhamphus janssi: Brief Summary

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Doryrhamphus janssi, commonly known as the Janss' pipefish , is a species of pipefish belonging to the family Syngnathidae.

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