Horseshoe Crab


Horseshoe Crab(Limulus polyphemus
Care: Easy   Temperament: Peaceful
Diet: Omnivore
Purchase Size: ~1-2’’
Water Parameters: Salinity 1.024-.26, Temp 77-78, ph 7.7-8.2
Population: 1/20 gallons    Reef Safe: yes
Lifespan:  20 years potentially
Breeding: No
Gender: Yes- females are larger and their foremost appendages are pincers
Drip acclimate

This very unique animal is a special order item, it is not currently in stock at our store but once your order is placed we will bring it in for you 🙂
Thanks for your understanding and please email us with any questions


Looking to add a living fossil to your reef tank?  If so then look no further than a horseshoe crab.  The horseshoe crab, or Limulus polyphemus, has populated oceans for well over 300 million years.  It even survived the extinction of the dinosaurs!  Interestingly, it is not a crab and is more closely related to spiders and scorpions.  It gets its name from its rounded head, which resembles a horse’s foot.  Horseshoe crab colouration varies from a light tank to dark brown.  Their colour variances are often an evolved trait to help them blend in with their surroundings and avoid predators.

1 in stock