Eel adjectives are listed in this post. Each word below can often be found in front of the noun eel in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing EEL.
common, conger
electric, freshwater
large, little
live, moray
silver, slippery
small
Hope this word list had the adjective used with eel you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
Please add more adjectives to make this list more complete: