Horseshoe Crab: Ancient Marine Arthropod with Unique Anatomy #3706593 (License: Personal Use)

This image features a mature horseshoe crab, identifiable by its chitinous exoskeleton, compound eyes on the prosoma, and elongated telson used for righting itself. Its mottled brown and tan coloration provides camouflage in shallow coastal waters. Despite its name, it is more closely related to spiders and scorpions than true crabs.

Used in educational, marine biology, or conservation-focused web content; ideal for articles on biodiversity, paleontology, or biomedical research (due to its blue blood’s use in endotoxin testing). Matches user intent for learning about ancient species or ecosystem roles.