Echinoderms Explained: Sea Stars, Sea Urchins, and the Ocean’s Weirdest Hydraulics

Send us Fan MailSubscribe and unleash your inner science goblin. We see you. We respect it.In this deep-dive episode of Wildly Curious, Katy Reiss and Laura Fawks Lapole crack open the bizarre, beautiful world of echinoderms—the “spiny-skinned” sea creatures that are hard on the outside, squishy on the inside, and powered by a literal hydraulic system.We’re talking sea stars, sea urchins, sand dollars, brittle stars, feather stars, and sea cucumbers—a group that looks like it shouldn’t make sense… until you learn the rules.🌊 The water vascular system and how tube feet work like living suction hydraulics  ⭐ Why echinoderms don’t have a centralized brain (and why that doesn’t mean “no thoughts”) 🧬 The wild symmetry twist: larvae start bilateral, then reorganize into radial body plans 🥒 Sea cucumbers and their most unhinged defense move: evisceration (yes, it’s what it sounds like)  🌿 Species spotlight: the sunflower sea star—a major predator of sea urchins that helps keep kelp forests alive  ⚠️ And the real-world crisis: sea star wasting syndrome, which caused catastrophic declines, including over 90% loss of sunflower sea stars in much of their range If you’ve ever looked at a sea star and thought “that thing has no business being real,” this episode is your guide to why it does—and why losing them changes entire ecosystems. Support the show🎉 Support us on Patreon to keep the episodes coming! 🪼🦤🧠 For more laughs, catch us on YouTube!Track a real wild animal. Support conservation. Feel slightly cooler than you did five seconds ago. Visit www.myfahlo.com to get 20% off tracking bracelets with code WildlyKaty.