a bed of eels ConfidencehighAttestationwikipedia-citedAlso used foroysters 2 sourcesWikipedia - List of animal namesZoological Society of San Diego - Animal group names
a swarm of eels ConfidencehighAttestationwikipedia-citedAlso used forants, bees, beetles, bugs, butterflies, flies, gnats, grasshoppers, moths, hornets +5 moreAlso spelledSwarme (1486) 2 sourcesWikipedia - List of animal namesZoological Society of San Diego - Animal group names