Question: are horseshoe crabs really crabs?
Answer: Despite their common name, horseshoe crabs are not really crabs (crustaceans), but are more closely related to spiders and scorpions. ... More than 20 species of migratory birds, loggerhead sea turtles, and a myriad of commercial and recreation fish and crab species rely on the crabs' eggs as an annual boon to their diets.