Latest Sea urchin Stories
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Exotic marine species, including giant seaweeds, are spreading fast, with harmful effects on native species, and are increasingly affecting the biodiversity of the Mediterranean seabed.
Researchers at the University of Gothenburg have shown that sea urchins see with their entire body despite having no eyes at all.
A team of scientists has combined embryological observations, genetic sequencing, and supercomputing to determine that a group of small disk-shaped animals that were once thought to represent a new class of animals are actually starfish that have lost the large star-shaped, adult body from their life cycle.
Estuaries are highly appropriate systems for evaluating contamination.
Wildlife Conservation Society confirms sea urchins destroy reef building algae in overfished sites on Kenya's coast.
To survive in a tumultuous environment, sea urchins literally eat through stone, using their teeth to carve out nooks where the spiny creatures hide from predators and protect themselves from the crashing surf on the rocky shores and tide pools where they live.
A study by University of Michigan paleontologist Tomasz Baumiller and colleagues finds that sea urchins have been preying on marine animals known as crinoids for more than 200 million years and suggests that such interactions drove one type of crinoid---the sea lily---to develop the ability to escape by creeping along the ocean floor.
Some of the most common minerals in biology, including those in bones and shells, have a mysterious structure: Their crystals are positioned in the same orientation, making them behave as one giant crystal, even though they do not look like a faceted crystal.
German scientists have cataloged the sea urchin axial complex, an internal structure with undetermined function. The researchers at the Charite University of Medicine in Berlin said the research shows within that group of marine invertebrates there exists a structural evolutionary interdependence of various internal organs.
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 Red Sea. Although it is capable of painful stings when stepped upon, the urchin is only somewhat...
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 into the sand, unlike the regular echinoids, or sea urchins. It can be found living within the...
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 diameter, with articulated plates making the test quite flexible. It prefers water temperatures between...
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 pores through which the tube feet project are both sunken below the general surface of the test. The...
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 plates vary from black, multicolored black to a pale brown. The arms are abnormally banded. They can...
- Growing in low tufty patches.