Blackedge Conger

Body moderately elongate. Tail slender, attenuate at tip. Snout bluntly pointed, protruding beyond tip of lower jaw. Preserve specimen, head and body pale brown dorsally, much paler on belly. Caudal fin black, pectoral fin pale (Ref. 37528). Dorsal-fin origin slightly behind anteriormost insertion of pectoral fin to above middle of appressed fin. Preanal lateral line pores 29-32 (Ref. 36324).

Found on the continental shelf. Benthic (Ref. 75154).

分布於西太平洋海域；臺灣海域目前出現在西南及東北海域。

產量少，漁民以底拖網或籠具捕獲；除當下雜魚製作成魚粉利用外，漁業之經濟價值較低。

身體延長，尾部側扁漸細，頭部及身體呈淡色，全長為鰓孔位體高及肛門位體高之21.7-23.9及19.9-30.9倍；肛門位於全長中點之前，肛門前長佔全長的37-39 %；尾長延長，其長度約為肛門前長的1.6-1.7倍；尾端柔軟，易彎折；背鰭起點約位於胸鰭中點之上方；奇鰭鰭條分節；胸鰭位於體高中點偏下方，胸鰭基部上緣約與眼睛上緣水平線等高；鰓孔約為斜線狀，位於身體側邊中點之下方；全長為頭長之6.8-7.1倍，吻端延長呈尖狀，口裂末端略為超過眼睛水平中點之下方，但未到達眼睛後緣，上顎長於下顎，前上顎齒外露，吻長大於眼直徑，吻長為眼直徑之1.4-2.0倍；眼睛大，約占頭長的14-19%；嘴唇不發達；前鼻孔為短管狀，靠近吻端，後鼻孔為橢圓形，約位於眼睛下緣之前方。上眼窩有3個感覺孔，下眼窩有5個感覺孔，前鰓顎有10個感覺孔，顳骨接合處有1個感覺孔；肛門前背鰭鰭條數為70；背鰭前側線孔數6-7，胸鰭前側線孔數4-5，肛門前側線孔數33-35；背鰭前脊椎骨數10，肛門前脊椎骨數37-40，血管閉合處前脊椎骨數46-49，總脊椎骨數150-155。陳 (2002)的新記錄/Rhechias retrotincta/，與李及楊 (1966) 的新記錄/Congrina retrotincta/為同屬異名，李及楊 (1966)為臺灣首次記錄本種。

棲息於100-200公尺深的沙泥底海域。

The Blackedge conger (Bathycongrus retrotinctus, also known as the Randall's conger) is an eel in the family Congridae (conger/garden eels). It was described by David Starr Jordan and John Otterbein Snyder in 1901, originally under the genus Leptocephalus. It is a marine, deep water-dwelling eel which is known from Japan to the Philippines, in the western Pacific Ocean. It dwells at a depth range of 150–450 metres. Males can reach a maximum total length of 54 centimetres.