To Puff Or Not To Puff

Everyone loves pretty pufferfish! Here in the Costa Rican Pacific coast we get many species from the very small spotted sharpnose puffer to the colour-changing guineafowl puffer.  Pufferfish are morphologically similar to the closely related porcupinefish which have large external spines, like the Spotfin Burrfish and the Freckled Porcupinefish.  Pufferfish are most diverse in tropical…