Pencil Urchin – Nano

(10 customer reviews)


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SKU: 263.8nano Category:


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.

Additional information

Dimensions 1 × 1 × 1 in

10 reviews for Pencil Urchin – Nano

  1. medrvmx5

    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

  2. Joseph

    I received one of these guys free, and it is a beautiful specimen, thank you.

  3. Richard Andres

    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.

  4. Andy szekeres

    When they say nano they mean nano. About the size of a dime, but a great add to the tank. Already wandering around.

  5. Michael Phelps

    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!

  6. Moses Taryanik

    They are awesome little fellas! Very fun to look at and they are great algae cleaners. A++++++!

  7. william darby eckles

    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.

  8. Lisa Schwamkrug

    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!


    I’m amazed that they can get into the smallest crevices. Fascinating to watch, but mostly hide when the lights are on.

  10. Janie Darlene Lyons

    Love my little guy. Active immediatly. I wish I would have ordered two.

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