Sea Urchins

From National Geographic

Fire Urchin, Indonesia

Photograph by Tim Laman

The spines of a fire urchin form a multicolored flower off Komodo Island, Indonesia. The blue swellings on the tip of each spine are filled with venom.

Pencil-Spined Urchin, Kingman Reef

Photograph by Brian J. Skerry

The spines of the omnivorous pencil-spined urchin extend outward from its body. There are some 700 species of sea urchins worldwide.

Sea Urchins, British Columbia

Photograph by Paul Nicklen

A nontoxic dye highlights water currents surrounding sea urchins off Vancouver Island, British Columbia. These small, spiny echinoderms are found in oceans all over the world.


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