Ichthys (Greek: ἰχθύς, capitalized ΙΧΘΥΣ; also transliterated and Latinized as icthus, ichthus or ikhthus), is the Ancient and Classical Greek word for "fish." In English, it refers to a symbol consisting of two intersecting arcs, the ends of the right side extending beyond the meeting point so as to resemble the profile of a fish, said to have been used by early Christians as a secret symbol[1] and now known colloquially as the "sign of the fish" or the "Jesus fish."[2] Several biblical passages associate Jesus with fish or fishing. For example, Jesus called his disciples "fishers of men" (e.g., Mark 1:17) and he miraculously fed 5,000 people with fish and bread (Matthew 14:15-21, Mark 6:30-44, Luke 9:12-17, and John 6:4-13).
https://www.newworldencyclopedia.org/entry/Ichthys
THE CHRIST (OIL) IS WITHIN YOU