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Sea urchin Reference Libraries

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Diadema setosum
2013-11-21 12:27:30

Diadema setosum is a species of long-spined sea urchin in the family Diadematidae. It’s a typical sea urchin, which exceptionally long and hollow spines that are mildly venomous. D. setosum is different from other Diadema with five distinctive white colored dots that can be found on its body. The species is located throughout the Indo-Pacific region, from Australia and Africa to Japan and the...

Eccentric Sand Dollar Dendraster excentricus
2013-11-21 12:20:48

The Eccentric Sand Dollar (Dendraster excentricus) known also as the Sea-Cake, Biscuit-Urchin, Western Sand Dollar, or the Pacific Sand Dollar, is a member of the order Clypeasteroida, better known as sand dollars, a species of flattened, burrowing sea urchins located along the Pacific Ocean from Alaska to Baja California. This species is an irregular echinoid that is flattened and burrows...

Red Sea Fire Urchin Asthenosoma marisrubri
2013-11-21 12:03:03

The Red Sea Fire Urchin or Toxic Leather Sea Urchin (Asthenosoma marisrubri) is a relatively common sea urchin with a widespread distribution within the Indo-Pacific, and was, until 1998, considered a color variant of Asthenosoma Varium. Sea urchins are close relatives are crinoids, brittle stars, sea cucumbers, and starfish, all being echinoderms. This species grows to 25 centimeters in...

Echinus tylodes
2013-11-15 10:51:41

Echinus tylodes is a species of sea urchin belonging to the Echinidae family. It’s white with rather sparse pink colored spines and is native to the eastern coast of North America including the Gulf of Mexico. This species has a sub-globular test that is about two-thirds as high as it is wide and grows to a diameter of 4 inches. The joints that are between the ambulacral plates and the...

Ophiocoma scolopendrina
2013-11-15 10:40:07

Ophiocoma scolopendrina is a species of brittle star in the family Ophiocomidae. Ophiocoma scolopendrina, similar to other brittle star, have long and thin arms stemming from a small dish-shaped body and are around the size of an outstretched human hand. They belong to the phylum of echinoderms, which incorporates sea urchins, sea stars, and sea cucumbers. Dorsal disc and dorsal arm...

Sea Potato Echinocardium cordatum
2013-11-14 13:16:11

The Sea Potato (Echinocardium cordatum) is a sea urchin belonging to the family Loveniidae. It’s located in sub-tidal regions in temperate seas around the globe and resides buried in the sandy sea floor. The sea potato is a heart-shaped urchin clothed in a dense mat of furrowed yellowish colored spines which grow from tubercles and mainly point backwards. The upper surface is flattened and...

Red Urchin Astropyga radiata
2013-11-14 12:40:05

The Red Urchin, False Fire Urchin, Fire Urchin or Blue Spotted Urchin (Astropyga radiata) is a species of sea urchin belonging to the family Diadematidae. It’s a large species with long spines and is found within the tropical Indo-Pacific region. It was initially described in 1778 by the German naturalist Nathaniel Gottfried Leske. This species is a large urchin with a test diameter of up...

Hatpin Urchin Centrostephanus longispinus
2013-11-14 12:05:28

The Hatpin Urchin (Centrostephanus longispinus) is a species of sea urchin belonging to the family Diadematidae. There are two subspecies, Centrostephanus l. longispinus, found in the eastern Atlantic and Mediterranean Sea and Centrostephanus I. rubricingulus, found in the western Atlantic. In the year 1940, Mortenson believed that C. longispinus and C. rubricingulus were closely related...

Black Sea Urchin Diadema antillarum
2013-11-06 11:22:21

Diadema antillarum, known also as the Lime Urchin, the Long-Spined Sea Urchin, or the Black Sea Urchin, is a species of sea urchin belonging to the family Diadematidae. It is characterized by its extremely long black spines. This species is the most plentiful and significant herbivore on the coral reefs of the western Atlantic and Caribbean basin. Then the population of these sea urchins...

Arbacia punctulata
2013-11-06 11:08:03

Arbacia punctulata is a species of Arbacia genus of purple-spined sea urchins. Its natural habitat is in the Western Atlantic Ocean. It can be found in shallow water from Massachusetts to Cuba and the Yucatan Peninsula, from Texas to Florida in the Gulf of Mexico, the coast from Panama to French Guiana and in the Lesser Antilles, normally on sandy, rocky, or shelly bottoms. It is omnivorous,...

Word of the Day
swell-mobsman
  • A member of the swell-mob; a genteelly clad pickpocket. Sometimes mobsman.
Use of the word 'swell-mobsman' dates at least to the early 1800s.