And giants they are. Of the 60,000 species of crustaceans on Earth, Japanese spider crabs are the largest, spanning up to 12.5 feet from the tip of one front claw to the other. They’re also one ...

(Image Credit: Bildagentur Zoonar GmbH/Shutterstock) Image of a male European fiddler crab, similar to the one in the study. Humans love to take liberties when we talk about our heights. But Afruca ...