The fish occupies a remarkably dense symbolic position within the depth-psychology corpus, functioning simultaneously as a marker of the unconscious, an emblem of the Self and its redemptive potential, a zodiacal and astrological coordinate, and an index of the ambivalence intrinsic to all archetypal images. Jung’s extended treatment in *Aion* stands as the corpus’s most sustained engagement: there the fish is traced through its Hebrew, Hellenistic, Gnostic, Christian, and alchemical registers, revealing it as a symbol that condenses the coincidentia oppositorum — at once sacred and abominable, eucharistic and devouring, soulish and instinctual. The Ichthys-Christ identification is shown to be inseparable from the precession of the equinoxes into Pisces, grounding soteriology in cosmic time. Von Franz, Edinger, and Neumann extend this ambivalence into fairy tale, clinical dream material, and Egyptian cult respectively, while Greene and Sasportas relocate it within the Neptune–Pisces complex of astrological psychology. Burkert supplies the ethnographic and sacrificial substrate: the sacred fish as simultaneously tabooed and ritually consumed. Across these voices a productive tension persists between the fish as contents of the unconscious (Jung’s ‘one of its contents’, distinct from the serpent as unconscious itself) and the fish as symbol of wholeness, redemption, and the Self’s paradoxical self-disclosure through the instinctual realm.