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Sea Urchins

Sea Urchins are round interesting spheres, with the spines extending. Sea Urchins make great additions to marine aquariums, consuming undesirable algae and detritus within the tank.

 Assorted Colored
Pin Cushion Urchin
Lytechinus vaniegatus
The Pincushion Urchin is a small Urchin that has sharp protruding spines. They grow to only 2-3 inches. In Nature, these spines serve as their defense mechanism from predators. All Urchins are nocturnal and do most of their grazing at night. During the day they will usually stay stationary on the aquarium glass, or in hiding spots in rockwork. Urchins are excellent algae eatersl and ike rockwork that they can crawl and feed on.

A great choice for the aquarium. They will use a series of tube feet on their underside to move about the tank in search of algae and detritus. They will scour the rockwork, glass and sandbed. Their colors range from all white, to white with pink or purple spikes, and sometimes they are all purple or all pink. Urchins are completely reef-safe.
REEFSAFE
$9.99 ea. - 3 for $27.00

  Long Spiny Urchin
Diadema setosum
These urchins are excellent algae controllers for an aquarium housing aggressive fish. The Black Longspine Urchin, also known as Long-spined Sea Urchin, has a body which is predominately black with a red eyespot in the center. The spines on these urchins are long, thin and completely black. During the day, it will hide among the rocks, in crevices, or under plants in a sandy substrate. At night, it will emerge to graze on the algae present in or near its home. It is sensitive to high levels of copper-based medications and it will not tolerate high nitrate levels. If it starts to lose a number of spines, it is often due to poor water conditions.
REEFSAFE
$16.99 each

  Red Slate Urchin
Heterocentrotus mammilatus
The Red Slate Pencil Urchin comes from Hawaii and is also known as Slate Pencil Urchin. It has a reddish-tan body with long, solid spines that taper at the tips and radiate out from the body in all directions at lengths of up to five inches. During the day, it will hide among the rocks, in crevices, or under plants in a sandy substrate. At night, it will emerge to graze on the algae present in or near its home. It is sensitive to high levels of copper-based medications and it will not tolerate high nitrate levels. If it starts to lose a number of spines, it is often due to poor water conditions. 
REEFSAFE
$29.99 each

  Pencil Urchin
Eucidaris tribuloides
These urchins are excellent algae controllers for an aquarium housing aggressive fish. Pencil Urchins have 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 gets older, its spines may become covered with coralline and other types of algae. During the day, it will hide among the rocks, in crevices, or under plants in a sandy substrate. At night, it will emerge to graze on the algae present in or near its home. It is sensitive to high levels of copper-based medications and it will not tolerate high nitrate levels. If it starts to lose a number of spines, it is often due to poor water conditions. 
REEFSAFE
$8.99 ea. - 4 for $30.00

 Blue Tuxedo Urchin
Mespilia globulus
These urchins are excellent algae controllers for an aquarium housing aggressive fish. The Tuxedo Pincushion Urchin, has five to ten broad-colored bands usually blue or black, with red, brown, or dark spines. This very striking combination, gives it the "formal" look and thus the name "Tuxedo Urchin." During the day, it will hide among the rocks, in crevices, or under plants in a sandy substrate. At night, it will emerge to graze on the algae present in or near its home. The Tuxedo Pincushion Urchin generally roams alone, but several of them could be housed in the same aquarium if it is large enough to provide them with adequate food (algae) and shelter. It is sensitive to high levels of copper-based medications and it will not tolerate high nitrate levels. If it starts to lose a number of spines, it is often due to poor water conditions.
REEFSAFE
$29.99 each