The order Anguilliformes includes 15 families (Nelson 1994). Species live in a variety of habitats from fresh water to the deep sea. Adults and larvae of several species are discussed in Böhlke (1989). Forey et al. (1996) included the saccopharyngiforms as a suborder of the Saccopharyngoidei.
Böhlke, E.B. (ed.) 1989. Fishes of the Western North Atlantic. Volume One: Orders Anguilliformes and Saccopharyngiformes. Volume Two: Leptocephali. Yale University : The Sears Foundation for Marine Research Part 9, 1055 pp.
Forey, P.L., Littlewood, D.T.J., Ritchie, P. & Meyer, A. 1996. Interrelationships of elopomorph fishes. pp. 175-192 in Stiassny, M.L.J., Parenti, L.R. & Johnson, G.D. (eds). Interrelationships of Fishes. San Diego : Academic Press 496 pp.
Nelson, J.S. 1994. Fishes of the World. New York : John Wiley & Sons 600 pp.