how big is a horseshoe crab
Although horseshoe crabs look similar to crabs and lobsters, they are actually more closely related to scorpions and spiders. Size: Horseshoe crab females are about 1/3 larger than the males. They can be about 18-19 inches from head to tail, while the males are approximately 14-15 inches. Diet: Horseshoe crabs like to dine on worms and clams. Typical Lifespan: Horseshoe crabs reach sexual maturity at around 10 years of age.