Blachea longicaudalis is an eel in the family Congridae (conger/garden eels).Blachea longicaudalis at www.fishbase.org. It was described by Emma Stanislavovna Karmovskaya in 2004.Karmovskaya, E. S., 2004 [ref. 28053] Benthopelagic bathyal conger eels of families Congridae and Nettastomatidae from the western tropical Pacific, with descriptions of ten new species. Journal of Ichthyology v. 44 (Suppl. 1): S1-S32. It is a marine, deep water-dwelling eel which is known from Fiji and New Caledonia, in the western Pacific Ocean. It dwells at a depth range of 400–461 metres. Males can reach a maximum total length of 68.3 centimetres, while females can reach a maximum TL of 57 cm.
The species epithet "longicaudalis" refers to the eel's elongated caudal fins.
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