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Two new cutthroat eel species are described from Vietnam. Dysomma intermediumsp. nov. has a relatively long trunk, being about half of head length and anal‐fin origin more than twice pectoral‐fin length behind the pectoral‐fin tip; pectoral fin well developed; dorsal‐fin origin over or slightly in front of base of pectoral fin; two intermaxillary teeth; four or five compound teeth on ethmovomer;...