Eel vs. Jellyfish — What's the Difference?

Eels are ray-finned fish belonging to the order Anguilliformes (), which consists of eight suborders, 19 families, 111 genera, and about 800 species. Eels undergo considerable development from the early larval stage to the eventual adult stage, and most are predators.

Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are anchored to the seabed by stalks rather than being mobile.

Any of various long, snakelike, scaleless marine or freshwater fishes of the order Anguilliformes that lack pelvic fins and characteristically migrate from fresh water to salt water to spawn.

Any of numerous usually free-swimming marine cnidarians of the class Scyphozoa, characteristically having a gelatinous, tentacled, often bell-shaped medusa stage as the dominant phase of its life cycle. Also called true jellyfish.

Any of several similar fishes, such as the lamprey and electric eel.

Any of various similar or related cnidarians.

Any freshwater or marine fish of the order Anguilliformes, which are elongated and resemble snakes.

(Informal) One who lacks force of character; a weakling.

The European eel, Anguilla anguilla.

An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.

To fish for eels.

A cnidarian, a member of the phylum Cnidaria.

To move with a sinuous motion like that of an eel.

A ctenophore, a member of the phylum Ctenophora (the comb jellies).

An elongated fish of many genera and species. The common eels of Europe and America belong to the genus Anguilla. The electrical eel is a species of Gymnotus. The so called vinegar eel is a minute nematode worm. See Conger eel, Electric eel, and Gymnotus.

A sudoku technique involving possible cell locations for a digit, or pair, or triple, in uniquely four rows and four columns only. This allows for the elimination of candidates around the grid.

The fatty flesh of eel; an elongate fish found in fresh water in Europe and America; large eels are usually smoked or pickled

Any one of the acalephs, esp. one of the larger species, having a jellylike appearance. See Medusa and acaleph.

Voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins

Large siphonophore having a bladderlike float and stinging tentacles

Any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans