Scientific Name: Limulus Polyphemus
Care Level: Easy
Reef Compatibility: No
Minimum Tank Size: 100 gal
Approximate Purchase Size: 1 to 3 inches
Max Size: Can get up to 12 inches
Notes: Horseshoe Crabs are a bottom feeding scavenger. They like a well-established deep, fine sand bed with a lot of open space to roam around in. When small, they are very efficient scavengers and are great for aerating and maintaining sand beds. The Horseshoe Crabs dig through sand and gravel in search of worms and any organic debris. It will move the substrate around almost nonstop in its search for food. They are reef safe, but when they attain a large size, can be harmful to fish and invertebrates, especially worms and clams. Although it may find some food scavenging, its diet should be supplemented with meaty items such as pieces of squid and shrimp.