The headless and brainless brittle stars have nerve cords that receive stimuli. Click to read more. Brittle stars, unlike starfish, spend most of their lives lurking under rocks and burrowing in the sand of the world's oceans.
Sea pigs belong to a genus of deepwater sea cucumbers. Click to read more. Sea pigs are marine animals that one might think resemble their swine counterparts on land due to their given name.