pencil urchin

Pencil Urchins For Saltwater Tanks

Pencil Urchins (Eucidaris tribuloides) are a popular invert for saltwater aquariums. They are also called slate pencil urchin or red pencil urchin. These inexpensive urchins usually go for around $10-$15, and they are a great addition to your tank’s clean up crew. They are efficient at eating away different types of algae, sponges, and coralline…