The past, present, and possible futures of Ser Brynden Tully of Riverrun, Knight of the Gate, called Blackfish.
During one of their louder quarrels, when Catelyn was eight, Lord Hoster had called Brynden “the black goat of the Tully flock.” Laughing, Brynden had pointed out that the sigil of their house was a leaping trout, so he ought to be a black fish rather than a black goat, and from that day forward he had taken it as his personal emblem. – AGOT, Catelyn VI
Even on his deathbed, Catelyn thought sadly. “He has not wed. You know that, Father. Nor will he ever.”
– AGOT, Catelyn XI
Nonetheless, during all those years of Catelyn’s girlhood, it had been Brynden the Blackfish to whom Lord Hoster’s children had run with their tears and their tales, when Father was too busy and Mother too ill. Catelyn, Lysa, Edmure … and yes, even Petyr Baelish, their father’s ward … he had listened to them all patiently, as he listened now, laughing at their triumphs and sympathizing with their childish misfortunes. – AGOT, Catelyn VI
Brynden Blackfish chuckled. “I am too old a soldier to believe that. Hoster will be chiding me about the Redwyne girl even as we light his funeral pyre, damn his bones.”
– AGOT, Catelyn XI