Latest Echinoidea Stories
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.
By Alvarado, Juan Jose Abstract: Between October 2003 and July 2005, aggregation behavior of the sea urchin Astropyga pulvinta Lamarck was studied in Bahia Culebra, Costa Rica. This sea urchin forms aggregations during part of the year and then disappears.
Decreasing pH the biggest threat to marine animal life for thousands of years.
That loud noise heard along rocky reefs near New Zealand at dawn and at dusk are sea urchins chowing down -- loudly, scientists said.
SEATTLE _ The odds of growing up aren't good for baby sand dollars. Smaller than the head of a pin, the larvae drift in the ocean _ easy prey for anything with a mouth.
Sea urchins are small and spiny, they have no eyes and they eat kelp and algae. Still, the sea creatureâ€™s genome is remarkably similar to humansâ€™ and may hold the key to preventing and curing several human diseases.
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...
Kina (Evechinus chloroticus) is a sea urchin that is native to New Zealand. This echinoderm belongs to the family Echinometridae and it has the potential to reach a maximum diameter of 16 to 17 centimeters. It is scattered throughout New Zealand and in some northern and southern offshore islands. It can be found in shallow waters around 12 to 14 meters deep, although there are also intertidal populations located in the north of both the North and South Islands. It shows a preference for...
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...
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 there’s an indentation close to the front. It’s a beige color but the tests that are found on...
- Withering but not falling off, as a blossom that persists on a twig after flowering.