Sea urchins or urchins (/ˈɜːrtʃɪnz/) are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed,...

The red sea urchin (Mesocentrotus franciscanus) is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California. It lives in shallow...

Sea urchin injuries are caused by contact with sea urchins, and are characterized by puncture wounds inflicted by the animal's brittle, fragile spines...

Purple sea urchin can refer to one of several species of sea urchin: Arbacia punctulata, a species of sea urchin from the family Arbaciidae commonly known...

genus of sea urchins. Sea urchins are echinoderms that are typically spherical or flattened with a covering of spine-like structures. Sea urchins tend to...

White sea urchin is a common name for several sea urchins and may refer to: Lytechinus anamesus [Wikidata] Salmacis sphaeroides [Wikidata] Tripneustes...

Kina (Evechinus chloroticus) is a sea urchin endemic to New Zealand. This echinoderm belongs to the family Echinometridae and it can reach a maximum diameter...

use tools. In most of its range, it is a keystone species, controlling sea urchin populations which would otherwise inflict extensive damage to kelp forest...

pileolus, commonly known as the flower urchin, is a widespread and commonly encountered species of sea urchin from the Indo-West Pacific. It is considered...

Look up sea urchin in Wiktionary, the free dictionary. A sea urchin is a spiny marine echinoderm. Sea Urchin may also refer to: The Sea Urchin (1913 film)...

Several species of sea urchin share the name green sea urchin: Lytechinus variegatus, also known as the variegated sea urchin Psammechinus microtuberculatus...

homeless children Sea urchins, spiny sea creatures Urchin (band), a band led by Dave Murray and Adrian Smith of Iron Maiden Urchin (album), a 1998 album...

of cacti native to South America, sometimes known as hedgehog cactus, sea-urchin cactus or Easter lily cactus. As of October 2023[update], there are about...

which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally...

sea urchins of the family Diadematidae. It is one of the most abundant, widespread, and ecologically important shallow water genera of tropical sea urchins...

development of the sea urchin, a marine invertebrate. The larval sea urchin does not resemble its adult form, because the sea urchin is an indirect developer...

masses, of fish and certain marine animals such as shrimp, scallop, sea urchins and squid. As a seafood, roe is used both as a cooked ingredient in many...

Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths over 9,000...

gastrulation, the blastocoel has been obliterated. At the 120- cell stage, the sea urchin embryo is considered a blastula because of its developed blastocoel, which...

also eat dead algae that they find. Some sea urchins, such as the variegated sea urchin or the red sea urchin, have become popular as pets for home aquariums...

the hard shell of some spherical marine animals and protists, notably sea urchins and microorganisms such as testate foraminiferans, radiolarians, and...

about gastrulation in the sea urchin. Recent simulations found that planar cell polarity is sufficient to drive sea urchin gastrulation. Shortly after...

concern. The Sunflower sea star is an important keystone species which helps control sea urchin abundance, but an outbreak of Sea star wasting disease and...

Lawrence, Edible sea urchins: biology and ecology, p. 410 Alan Davidson, Oxford Companion to Food, s.v. sea urchin Lawrence, John M., "Sea Urchin Roe Cuisine"...

invasive species. Sea Stars (starfish) are the main predators of kelp-eating sea urchins. Satellite imagery shows that sea urchin populations have exploded...

Strongylocentrotus purpuratus is a species of sea urchin in the family Strongylocentrotidae commonly known as the purple sea urchin. It lives along the eastern edge...

Germany, described the fusion of nuclei of spermatozoa and of ova from sea urchin. The evolution of fertilisation is related to the origin of meiosis, as...

Astropyga radiata, the red urchin, fire urchin, false fire urchin or blue-spotted urchin, is a species of sea urchin in the family Diadematidae. It is...

made of calcium carbonate cemented onto other surfaces. The shells of sea urchins are called "tests", and the moulted shells of crabs and lobsters are...

Lytechinus variegatus, commonly called the green sea urchin or the variegated sea urchin, is a species of sea urchin that can be found in the warm waters of the...