Marbled eel is a common name for several fishes; while it most commonly refers to Anguilla marmorata, it may also refer to:
Anarchias seychellensis, Seychelles moray, or marbled reef-eel Anguilla marmorata, marbled eel or giant mottled eel Anguilla reinhardtii, marbled eel or speckled longfin eel Callechelys marmorata, marbled snake eel Gymnothorax obesus, speckled moray or marbled reef eel Lepophidium marmoratum, marbled brotula or marbled cusk-eel Muraenolepis marmorata, marbled moray cod or marbled eel-cod Mastacembelus vanderwaali, ocellated spiny eel or marbled spiny-eel Mastacembelus armatus, large spiny eel or marbled spiny eel Synbranchus marmoratus, marbled swamp eel or mottled swamp eel Torpedo sinuspersici, marbled electric eel or gulf torpedo, an electric ray Uropterygius marmoratus, marbled reef-eel, marbled eel or slender conger eel