Saltwater Aquarium Inverts for Marine Reef Aquariums: Pencil Urchin
Free Shipping!
Pencil Urchin
Due to variations within species, your item may not look identical to the image provided.
Pencil Urchin (Eucidaris tribuloides)
Additional locales and sizes may be available!

Quick Stats

Care Level Moderate
Temperament Peaceful
Color Form Black, Red, Tan, White
Diet Omnivore
Reef Compatible No
Water Conditions 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025
Max. Size 5"
Origin Caribbean, Philippines
Family Cidaridae
Minimum Tank Size 30 gallons
What do these Quick Stats mean? Click here for more information

Overview

The Pencil Urchin of the Eucidaris genera is also known as the Mine or Club Urchin. It has a brown, sometimes mottled body with stubby, thick spines radiating out in all directions. The spines are surrounded by basal plates. Never try to pry it out of a hole, as you will break its spines before it lets go. As it ages, its spines may become covered with coralline and other types of algae.

During the day it will seek shelter in the rocks; at night it will come out and forage for food, looking particularly for algae lawns and smaller invertebrates like sea squirts or sponges. It can be destructive to corals. It requires an aquarium with multiple hiding places and live rock on which it can graze. The rock formations should be sturdy, since the Urchin could dislodge rocks as it moves around the tank. The Pencil Urchin is very sensitive to high levels of copper-based medications and will not tolerate high levels of nitrates. If water conditions are poor, it will shed its spines.

It is extremely difficult to breed in an aquarium and has no distinguishing characteristics to help differentiate it from its mate.

It should be offered dried seaweed and some animal-based supplemental foods.

Approximate Purchase Size: 1-1/2" to 3-1/2"

Supplies You May Be Interested In

Customer Testimonials

K Andon Saint Charles , IL
I have had one of these for years. Its a very neat addition. I did have to move it from my reef tank to my FOWLR due to it eating my sponges, corals, and moving rocks around. Overall I would recommend it for a FOWLR.
1-1 of 1 testimonials

Bookmark and Share
DFS21
Contact us
LIVE HELP
8:30 am - 5 pm CST
7 days a week

EMAIL US
CALL US
1-800-334-3699
8:30 am - 5:00 pm CST, Mon - Fri