@.extremenature: The Deep-Sea Fish That Turns Into a Spiked Balloon in Seconds (Coffinfish) On the seafloor, most animals rely on speed or hiding. This fish does neither. The coffinfish can more than double its volume in under a second, transforming into a rigid, spiked sphere when threatened. It rapidly pumps water into its body, expanding its stomach and lifting defensive spines outward. Unlike pufferfish, it does not rely on toxins—only structure and control. To a predator, what looked like an easy meal suddenly becomes physically impossible to swallow. A transformation that happens before the bite even lands. Did you know some deep-sea fish defend themselves by rapidly inflating their entire body? Follow for more extreme creatures from the depths. #OceanScience #MarineBiology #Coffinfish #Educational #NatureDocumentary