Do Christians know exactly what this symbol actually symbolizes? I was once told it represented "Jonah" who was swallowed by a whale and "resurrected" in 3 days.
Christians believe this represented Jesus Christ's resurrection. Also known as "Easter". So The Fish Symbol with the word "Chirst" basically represent's rebirth.
However, some have speculated this this "fish" symbol is actually a "Yoni" symbol. Which represents the female's genitals. Over 20,000 years before the invention of the male Gods of ancient mythology, the Mother Goddess was considered the greatest mystic power of the universe.
Read more: http://www.luciferianliberationfront.org/sf.html