Visvanatha Cakravarti Thakura remarks that Saubhari Muni had fallen from his austerity because of a vaisnava-aparadha
SB Canto 9
Thereafter, one day while Saubhari Muni, who was expert in chanting mantras, was sitting in a secluded place, he thought to himself about the cause of his falldown, which was simply that he had associated himself with the sexual affairs of the fish.
Viśvanātha Cakravartī Ṭhākura remarks that Saubhari Muni had fallen from his austerity because of a vaiṣṇava-aparādha. The history is that when Garuḍa wanted to eat fish, Saubhari Muni unnecessarily gave the fish shelter under his care. Because Garuḍa's plans for eating were disappointed, Saubhari Muni certainly committed a great offense to a Vaiṣṇava. Because of this vaiṣṇava-aparādha, an offense at the lotus feet of a Vaiṣṇava, Saubhari Muni fell from his exalted position of mystic tapasya. One should not, therefore, impede the activities of a Vaiṣṇava. This is the lesson we must learn from this incident concerning Saubhari Muni.