Il riccio di mare è velenoso? Ti spiego come è fatto e che succede se ti punge

You might encounter one when walking on the rocks, and accidentally stepping on one wouldn't be pleasant because of its spines: we're talking about the sea urchin. But do you know what kind of animal it is and what it actually looks like? In this new episode of #IncontriSelvaggi, ethologist and content creator Margherita Paiano answers all the questions you might have about these peculiar animals: how do they move? What are their spines made of? What's hidden inside their shell? And, of course, what should you do if you encounter (or step on) one? 0:00 What is a sea urchin? 1:14 What does a sea urchin look like? 4:03 How does a sea urchin's circulatory system work? 4:49 How do sea urchins move? 6:47 Two interesting facts about sea urchins? 7:53 How many species of sea urchin exist? 8:40 The internal structure of spines. 10:22 What to do if you step on a sea urchin. Here's the video about the starfish 👉    • Non toccare le stelle marine! Ti spiego pe...