Saltwater Aquarium Inverts for Marine Reef Aquariums: Longspine Urchin, Blue Spot, Astropyga radiata View Cart You may change your account settings, including your Billing & Shipping Addresses, Credit Card Information, as well as Express Checkout status.
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Home > Marine Invertebrates > Urchins > Longspine Urchin, Blue Spot
Longspine Urchin, Blue Spot (Astropyga radiata)
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Due to variations within species, your item may not look identical to the image provided.
 QUICK STATS
Care Level: Easy
Temperament: Peaceful
Reef Compatible: With Caution
Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025
Max. Size: 8"
Color Form: Blue, Tan
Venomous: Yes
Diet: Omnivore
Origin: Indonesia, Maldives
Family: Diadematidae

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overview
The Blue Spot Longspine Urchin, also known as the Radiating Hatpin Urchin, has a magnificently colored body with bright electric blue spots outlining five bands from a central ring. The long, thin spines captivate the eye, banded tan and brown and endlessly moving as the urchin patrols the reef.

The Blue Spot Longspine Urchin makes an excellent algae controller for an aquarium housing aggressive fish. Provide an aquarium with ample hiding places and room to roam. The rock formations should be sturdy, since the Urchin could dislodge rocks as it moves around the tank. Being a nocturnal creature, the Blue Spot Longspine Urchin will hide during the day and only come out at night to forage for food.

When approached by most fish, these urchins will sense their presence, and will defend itself by directing its spines towards its offender. In the wild, these urchins sometimes provide shelter to a variety of other organisms including commensal shrimp, crabs, and cardinalfish that find solace from predators within the urchins' spines during daylight hours.

It is very sensitive to high levels of copper-based medications and will not tolerate high nitrate levels. If it begins to shed its spines, it is a sign of very poor water quality.

Be aware, it is venomous, with its sting being roughly equivalent to that of a bee sting.

The diet of the Lonspine Urchin, Blue Spot should consist of dried seaweed and some animal-based supplemental foods. If an ample food source is not present in the aquarium it may attempt to eat corals.

Approximate Purchase Size: Small: 1" to 2"; Medium: 2" to 3-1/4"; Large: 3-1/4" to 4-1/2"


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*Prices subject to change on out of stock items
  SW - Longspine Urchin, Blue Spot - Small
  CN-77947,  $ 34.99
 
    
  SW - Longspine Urchin, Blue Spot - Medium
  CN-77948,  $ 39.99
 
    
  SW - Longspine Urchin, Blue Spot - Large
  CN-77949,  $ 44.99
 
    
  SW - Longspine Urchin, Blue Spot - Small
  CN-77950,  $ 39.99
 
    
  SW - Longspine Urchin, Blue Spot - Medium
  CN-77951,  $ 44.99
 
    
  SW - Longspine Urchin, Blue Spot - Large
  CN-77952,  $ 59.99
 
    
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Acclimation Guide
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