Host Ian Sample and producer Maddy discuss The Guardian’s third annual Invertebrate of the Year competition, highlighting nominees like the immortal jellyfish, the prehistoric horseshoe crab, and the photosynthetic leaf sheep. They explore these creatures' unique biological traits, such as biological immortality and solar-powered digestion, to challenge negative perceptions of invertebrates. The episode aims to celebrate the ecological importance and wonder of these often-overlooked animals.