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 of the world’s largest arthropods, animals with no backbone ...

Horseshoe crabs are marine arthropods that live primarily in and around shallow ocean waters on soft sandy or muddy bottoms. They occasionally come onto shore to mate. They are commonly used as ...

Horseshoe crabs are marine arthropods which are important to the food chain. They have been crawling on the planet for over a hundred million years before the era of dinosaurs. These are mostly ...

From late March until June is when these hard-shelled arthropods, scientific name Limulus Polyphemus, come crawling onto the beach. However, new research is observing that horseshoe crabs are ...

Carcinized clades are: sponge crabs, "higher" true crabs, porcelain crabs, hairy stone crabs, and king crabs. Decarcinized clade shown is the frog crabs. Disclaimer: AAAS and EurekAlert!

Horseshoe crabs have saved countless human lives, and now we should return the favor.” Horseshoe crabs are brown, body-armored arthropods with 10 eyes and a long, spiked tail. Despite their ...

Horseshoe crabs are brown, body-armored arthropods with 10 eyes and a long, spiked tail. Despite their intimidating appearance, they are completely harmless to humans. Each spring along the Atlantic ...