The Puffer Forum

So I was reading the profile's of bothe these fish in the PufferPedia and it says both fish reach about 19". Yet the suggested min tank size for a S&S puffer is 180 but 300 is prefered while the Porcupine min tank size is 120. Is this because the Porcupine is more sedentary or is this just because somone low balled the porcupine's space requirement?

A S&S puffer of the same length is much heavier than a Porcupine puffer, more biomass.