Question: are checkered puffer fish poisonous?
Answer: Also, Checkered Puffers were found to provide an astonishing 71.5% of the estuary's fish biomass, and the fish is one of five species in the estuary able to tolerate the least salty water. ... And Checkered Puffer flesh can be toxic, which may explain their apparent nonchalantness in a predator-prey world.