Ichthys

Ichthys, from greek: (ἰχθύς, Ichthys ; fish), (capitalized ΙΧΘΥΣ or ΙΧΘΥϹ) is the Koine Greek word for "fish". The Ichthys symbol was adopted as a Christian symbol because it was related to the acronym for "Ἰησοῦς Χριστός, Θεοῦ Υἱός, Σωτήρ, Iēsous Christos, Theou Yios, Sōtēr" which in English means "Jesus Christ, Son of God, Savior."

See also

Darwin fish