Fish Species

Horseshoe Crab

Horseshoe Crab - Description

The Horseshoe Crab is also commonly known as the Helmet crab, Saucepan or Horsefoot! Although called a crab, they are in fact more closely related to Ticks, Scorpions and Spiders!

They are named after the shape of their shell or carapace and are not true crabs. There are four species of horseshoe crabs:

- Limulus polyphemus (Atlantic horseshoe crab)
- Carcinoscorpius rotundicauda (Mangrove horseshoe crab)
- Tachypleus gigas
- Tachypleus tridentatus

Profile of the Horseshoe Crab

This Profile contains interesting facts and information about the Horseshoe Crab species.

  • Fish Tank conditions: PH 8.0 to 8.4

  • Diet / Feeding: Small crustaceans, Worms

  • Habitat: Bottom dwellers

  • Range: Northern Atlantic, Gulf of Mexico

Scientific Classification of the Horseshoe Crab

Definition: Scientific classification, or biological classification, is how biologists group and categorize species of organisms with shared physical characteristics. Scientific classification belongs to the science of taxonomy.

  • Species: Carcinoscorpius rotundicauda, Limulus polyphemus, Tachypleus gigas, Tachypleus tridentatus

  • Popular Name: Horseshoe Crab - Atlantic Horseshoe Crab - Mangrove Horseshoe Crab

  • Kingdom: Animalia

  • Phylum: Arthropoda

  • Class: Merostomata

  • Order: Xiphosurida

  • Family: Limulidae

Crustaceans Index

Facts about Fish Species - Horseshoe Crab

The colours, shapes and sizes of individual fishes varies enormously - you really need excellent quality pictures or photographs to assist in the identification process.


A combination of the number of fins and their characteristics, color, scale counts, general features, maximum length and distribution are used during a species identification process.

The species detailed on this website are Tropical, Saltwater, Aquarium , Marine , Pet , Pond, Clown, Koi,
Beta (Betta), Gold Fish (Goldfish), Star, Angel, Puffer, Discus, Piranha, Rainbow, Parrot, Crustaceans, Sea Anemones and Coral.

For more information and pictures of the Horseshoe Crab visit the
Full Fish Species Website

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