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This is a Nano/Pico sized pencil urchin, Eucidaris tribuloides from the Caribbean. They eat algae from the rocks and the walls of your tank. They are not considered reef-safe.
– January 24, 2022
Got one as a hitchhiker on a live rock order. Survived the shipping. Was on the bottom, thought he was dead, but put him in a bucket of water and he moved around. Put him in tank, and he wanders around, sometimes hard to spot, but I have a lot of nooks and crannies. Not out in the open much, but spot him every once in a while
– June 22, 2016
I received one of these guys free, and it is a beautiful specimen, thank you.
– October 19, 2011
Very nano, but this is exactly what I was looking for. Probably the size of a dime. If you want bigger, get the standard size, but I love this little guy.
– March 22, 2011
When they say nano they mean nano. About the size of a dime, but a great add to the tank. Already wandering around.
– June 23, 2010
This is one of the coolest animals I have added to my reef! I really wish I had ordered two! It arrived well packed and was active immediately after being temp acclimated. I was amazed that it is able to climb vertically and hang on in the high flow. Very cool and interesting critter!
– April 1, 2010
They are awesome little fellas! Very fun to look at and they are great algae cleaners. A++++++!
william darby eckles
– September 19, 2008
Awesome litte guys! The 4 I received are out at all tiems, day or night, and are really mobile. One seems to enjoy a good tumble across the sand every now and then, on purpose. They even go after the coraline algae starting on teh glass. Fascinaing to watch.
– September 4, 2008
I got four of these little guys to tackle an algae problem in one of my nano tanks. They went to work immediately along with some snails I got, and the algae has already diminished greatly in a week’s time!
– February 8, 2008
I’m amazed that they can get into the smallest crevices. Fascinating to watch, but mostly hide when the lights are on.
Janie Darlene Lyons
– March 12, 2007
Love my little guy. Active immediatly. I wish I would have ordered two.
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