Dysomma opisthoproctus Chen & Mok, 1995
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Family:  Synaphobranchidae (Cutthroat eels), subfamily: Ilyophinae
Max. size:  42.06 cm TL (male/unsexed)
Environment:  demersal; marine; depth range - 200 m
Distribution:  Northwest Pacific: known only from Nan-Fong-Ao, northeastern Taiwan.
Diagnosis:  Vertebrae: 120-120. This species is distinguished by the following characters: with pectoral fin; dorsal-fin origin is in front of level of pectoral-fin base, predorsal length 10.6% TL; anus is posterior and far behind tip of pectoral fin, preanal length 35.1% TL; trunk is very long, trunk length 20.2% TL; intermaxillary teeth 2; compound teeth on vomer 4; multiple rows of small teeth on the upper jaw; a row of 7 or 8 large compound teeth on lower jaw; head pores: IO 4, SO 3, M 7, POP 0, AD 1; lateral-line pores: prepectoral 6, preanal 24, lateral line runs to more than 2 head length before caudal fin; 25 preanal vertebrae, 120 total vertebrae; colour of body brownish dorsally and paler ventrally with lower part of posterior margin of anal fin and caudal fin black (Ref. 31561).
Biology:  Maximum depth reported based on a single specimen (Ref. 31561). Minimum depth from Ref. 58018.
IUCN Red List Status: Not Evaluated (N.E.) Ref. (123251)
Threat to humans:  harmless
Country info:   

Entered by: Garilao, Cristina V. - 27.10.99
Modified by: Kesner-Reyes, Kathleen - 25.01.13

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