THE FISH WHO KNOWS
I was recently (last year) listening to a set of lectures on ancient Anatolia and the professor mentioned a record of a particular set of “tame fish” who resided in a temple or palace (can’t remember which now) that one could call to (orally) and they would swim up to you. (As you might call a dog.) They were famous and widely known of. Records existed of them. These fish were considered sacred. And even intelligent.
Anyway they gave me an idea-set for a set of fish to be included in my trilogy of novels the Kithariune. The ideas are as follows. These fish are owned by the Sidh or the Lorahn (haven’t decided yet) and are extremely ancient and well known. They are also considered sacred and intelligent. They can trigger highly accurate but confusing prophetic visions and dreams if they bite you upon the finger but their bite is extremely toxic and often kills those whom they bite. Therefore few ever risk such a prophetic vision except in extremis, even the Samarls who are said to be usually immune to both disease and poison. Because even if the fish cannot kill a Samarl they might still put one in a coma or make him extremely ill, perhaps even for life. So the fish have not been used to stimulate prophetic visions in many centuries.
However, according to legend and myth, there is another way the fish can stimulate prophetic visions. And that is to kill, cook, and eat one. (Eating one raw will kill a person but eating a cooked one usually only induces an illness.)
So, one person in the court catches one of the fish, kills it, eats it, and has a set of prophetic visions. However because the fish are considered sacred, because they are very long lived, and because they are considered intelligent it is a crime to kill one. On the same level to the Eldevens as to kill a person. And supposedly a curse is inflicted upon anyone who would dare kill one of these fish. But the curse does not stop there but also extends to the entire group of people who are supposed to be the caretakers and guardians of these fish. Another later attempt is made to exterminate and wipe out all of these fish when the visions occur because the person who ate the fish is afraid the other fish might impart the knowledge of his identity to others.
In any case there will be an ongoing sub-plot (which later develops into a major plot point) about this fish killing, the prophetic dreams, and the accompanying curse. And the Eldevens will have to find a way to either thwart the visions and curse, or to avoid them because the criminal who committed this act resides deeply in the court of the Samarl and because he is a spy.
Later in the story/plot it will be discovered that these fish are tied to the Sidhelic and Eldeven Cult of these Sacred (Prophetic) Fish which is itself tied to the underground Fish Cult of Jesus Christ among the Eldevens. (The Fish being an early and secret sign of Christ among the cult of the first Christians.)