In Celtic mythology fish, and in particular, salmon are associated with knowledge and sacred wells.
Salmon were consulted by Celtic heroes for their wisdom and forethought; and to eat a salmon, was to gain immediate knowledge.
The Salmon supposedly gained its knowledge by consuming the nine hazel nuts of wisdom that fell into the Well of Segais, the primary source of all knowledge in Celtic lore.
The salmon is associated with prophecy and inspiration because of its instinct to find its distant spawning grounds.