Here are 9 more facts you may not know about starfish. That's right—starfish ... something very few animals can do. 5. They Don't Have Any Blood Rather than blood coursing through their veins ...

Check this out—starfish? They're basically heads that can crawl! Oh, and speaking of cool animal facts, ever heard howler monkeys? They're so loud, you can hear them from three miles away!

While the cartoon starfish Patrick Star from "SpongeBob Squarepants" is famously stupid, his real-life counterpart in science may in fact be all head. This at least is the conclusion of a landmark ...