Puffers
Puffers, or swellfish, have the ability to inflate themselves with water or air into a ball-like form when they feel threatened or attacked. They are commonly found in warmer regions, mainly living in the ocean, but also able to survive in freshwater. Some puffers grow to about three feet long, but the average ones are considerably smaller in length. Puffers are highly poisonous and are considered to be the most toxic vertebrates in the world. Humans who don’t seek immediate medical attention after a puffer sting can die, as the toxin causes paralysis which can quickly lead to a cessation of breathing. Puffers are sometimes eaten as a delicacy, but care should be taken (by a qualified chef) to clean and prepare them meticulously.