Happy scroll on Instagram: "This video captures one of the ocean’s most striking survival behaviors as a pufferfish, also known as a blowfish, rapidly inflates in shallow water when it senses a threat. Beginning in its normal, compact form, the fish suddenly gulps water and expands within seconds, transforming into a dramatically enlarged, nearly spherical shape. As its body swells, rigid spines protrude outward, creating a spiky barrier that makes the fish appear far larger and nearly impossibl