Big Caesar is a fictional animal character in the Hey Arnold! TV Series.

Big Caesar is a prehistoric fish that is 10 feet long and lives in the City Lake. It was seen by Grandpa, and was caught several decades later by Arnold and Gerald during a fishing contest, though they ultimately decided to release Big Caesar.

Urban legend

Big Caesar is the figure of an urban legend (see the Legend of Big Caesar).

Appears in


  • The binomial name of his species is "Caesaricus biggus".
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