why is the horseshoe crab not a true crab
Description. Horseshoe crabs are not true crabs as their name suggests. In fact, they are more closely related to spiders, ticks, and scorpions. The brown horseshoe-shaped helmet of the shell protects the crab from predation by sharks, turtles, and sea gulls.escription. Horseshoe crabs are not true crabs as their name suggests. In fact, they are more closely related to spiders, ticks, and scorpions. The brown horseshoe-shaped helmet of the shell protects the crab from predation by sharks, turtles, and sea gulls.