A long, thin, snake-like fish with smooth, slippery skin.
From Old English 'ǣl', from Proto-Germanic '*ēlaz'. The word is very old, and similar forms appear in several Germanic languages.
Eels look like snakes but are true fish, with tiny scales and a remarkable ability to swim backward. Some species migrate thousands of kilometers between rivers and the deep ocean in mysterious life cycles scientists still don’t fully understand.
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