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Sea Urchin


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marine fish Showing 4 of 14 products Click here to see all results
Blue Tuxedo Urchin

Blue Tuxedo Urchin

(Mespilia globulus)
Starting at $21.99
Pajama Cardinalfish

Pajama Cardinalfish

(Sphaeramia nematoptera)
Starting at $10.99
Yellowstriped Cardinalfish

Yellowstriped Cardinalfish

(Ostorhinchus cyanosoma)
Starting at $14.99
Longspine Cardinalfish

Longspine Cardinalfish

(Zoramia leptacantha)
Starting at $16.99

marine inverts & plants Showing 4 of 13 products Click here to see all results
Pencil Urchin, Red Slate

Pencil Urchin, Red Slate

(Heterocentrotus mammilatus)
Starting at $19.99
Sea Apple

Sea Apple

(Pseudocolochirus violaceus)
Starting at $29.99
Longspine Urchin, Black

Longspine Urchin, Black

(Diadema setosum)
Starting at $19.99
Pencil Urchin

Pencil Urchin

(Eucidaris tribuloides)
Starting at $9.99

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Hikari Mega-Marine Angel

Hikari Mega-Marine Angel

(LiveAquaria® Approved)
Starting at $3.99
Hikari Mega-Marine

Hikari Mega-Marine

(LiveAquaria® Approved)
Starting at $3.99
Hikari Mega-Marine Algae Frozen Food

Hikari Mega-Marine Algae Frozen Food

(LiveAquaria® Approved)
Starting at $3.99

ora® fish, corals & inverts Showing 1 of 1 products Click here to see all results
Tank Bred
Pajama Cardinalfish, Captive-Bred ORA®

Pajama Cardinalfish, Captive-Bred ORA®

(Sphaeramia nematoptera)
Starting at $24.99

articles Showing 4 of 8 articles Click here to see all results
There are over 800 different species of sea urchins varying greatly in appearance, ranging in size from less than an inch to over a foot across in an assortment of shapes and colors. 
Just as radial symmetry is most noticeable in sea stars, sea stars are also the most well known of all echinoderms. Sea stars live in all oceans and in virtually all zones within the reef. 
Like the brittle stars, sea cucumbers perform a valuable function by constantly removing detritus from the substrate. 
While sea urchins may be considered the brutes of the echinoderms, feather stars are the delicate flowers of the group. 

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