Detailed Explanation on Instagram: "Ribbon worms can seem alien because their bodies operate in ways that feel completely unlike anything familiar on land, since many species are long, gelatinous, and extremely flexible, allowing them to stretch and contract to bizarre proportions. Their most famously alien feature is the proboscis, a hidden, muscular tube they can explosively shoot out from their head to grab prey, which in some species unfurls like a sticky web or a spiraling harpoon. Follow @