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The Halloween Urchin, scientifically known as Tripneustes gratilla, is a captivating and highly sought-after marine invertebrate that adds a touch of intrigue and elegance to saltwater aquariums. With its unique appearance and fascinating behavior, the Halloween Urchin is a true gem that will enhance the visual appeal of your underwater landscape.


The Halloween Urchin showcases a striking coloration, featuring a base of deep black or dark brown with contrasting bright orange or white spines. This coloration resembles the festive colors of Halloween, earning it its popular name. Their spines move rhythmically, creating a mesmerizing and soothing visual effect in the aquarium.


These urchins are known for their important role in aquarium maintenance. They are natural grazers and will feed on algae and detritus, contributing to the cleanliness of the aquarium. Their presence can help control algae growth and promote a healthier ecosystem.


Caring for the Halloween Urchin involves creating a stable environment with appropriate water parameters. They thrive in a marine environment with proper salinity, temperature, and pH levels. A well-established aquarium with ample hiding spots and live rock will contribute to their well-being. While they primarily feed on algae, supplementing their diet with occasional algae-based foods will help maintain their health.


Water Parameters:

  • Temperature: 72-78°F
  • pH: 8.1-8.4
  • Salinity: 1.023-1.025


Please note that these are general guidelines, and for more accurate values, we encourage you to contact Living Aquarium by phone or in person. Our team of experts is always happy to provide personalized guidance and answer any questions you may have about the care of the Halloween Urchin.

Halloween Urchin

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