“I lost 20 pounds since all this happened,” Bruce Smith, 64, of Smithtown, told The Post. “I would get up at 3 a.m. every night to come out here, dreading to come out here, and they’d be on their side and gasping and you knew the next time, they’d be gone. There was no stopping it.”

Smith was so devastated by the loss of his finned friends that he’s suing PetSmart in Brooklyn Federal Court for emotional distress.