Rosie the Porcupine Puffer. After 2 small puffers succumbed to death by Tunze Stream intake, we found Rosie, who at 5" is big enough to handle the Streams. In fact, she loves to swim in front of them and get blown about. Rosie came to us from a 40gal tank she had outgrown. She seems quite happy in her new 700gal home, if a bit frustrated by her inability to catch any of the tasty-looking Chromis who live with her.