The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow. Astropyga Gray, 1825 Astropyga...

setosum is a species of long-spined sea urchin belonging to the family Diadematidae. It is a typical sea urchin, with extremely long, hollow spines that...

family Diadematidae. The banded sea urchin has a slightly oval test (shell), reaching a diameter of about 5 cm. Like almost all the Diadematidae (but it...

species, protect the urchin from predators. Some tropical sea urchins like Diadematidae, Echinothuriidae and Toxopneustidae have venomous spines. Other creatures...

urchin or blue-spotted urchin, is a species of sea urchin in the family Diadematidae. It is a large species with long spines and is found in the tropical...

the long-spined sea urchin, is a species of sea urchin in the family Diadematidae. This sea urchin is characterized by its exceptionally long black spines...

mexicanum is a species of long-spined sea urchin belonging to the family Diadematidae. It is native to the Pacific coast of Mexico, Costa Rica, El Salvador...

savignyi is a species of long-spined sea urchin belonging to the family Diadematidae. Common names include long-spined sea urchin, black longspine urchin...

5 in). If the spines enter into count, the biggest species may be a Diadematidae like Diadema setosum, with a test up to 10 cm (3.9 in) only, but its...

Centrostephanus rodgersii is a species of sea urchin of the family Diadematidae. It is a big, dark-purple sea urchin, with long and slender spines, reflecting...

longispinus, the hatpin urchin, is a species of sea urchin in the family Diadematidae. There are two subspecies, Centrostephanus l. longispinus, found in the...

(Echinothrix diadema) is a species of tropical sea urchin, member of the Diadematidae family. Echinothrix diadema is a long spined urchin. With its spines...

Astropyga magnifica is a species of sea urchin of the family Diadematidae. In life, their test is covered with spines. Astropyga magnifica was first scientifically...

the long-spined sea urchin, is a species of sea urchin in the family Diadematidae. It is found in the western Indo-Pacific Ocean and in Hawaii and other...

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

known as crowned sea urchin, is a species of sea urchin in the family Diadematidae. It was first described to science by Yale zoology Professor Addison...

According to ITIS : family Aspidodiadematidae (Duncan, 1889) family Diadematidae (Gray, 1855) family Lissodiadematidae (Mortensen, 1903) family Micropygidae...

with different microstructure, in a similar way to the spines of some Diadematidae (especially Echinothrix) and Toxopneustidae. The secondary spines are...

variolaris burrowing in Réunion island They can be confused with the Diadematidae sea urchins which sho longer and more slender spines, with an anal papilla...

Diadema palmeri is a red sea urchin of the family Diadematidae. It was first discovered by William (Bill) Palmer, at a depth of about 40 m (130 ft) off...

longispinus rubricingulus is a subspecies of sea urchins of the Family Diadematidae. Their armour is covered with spines. C. l. rubricingulus was first scientifically...

Diadema (sea urchin), a genus of sea urchin belonging to the family Diadematidae Diadema (fungus), a genus of fungi in the family Diademaceae Damon diadema...

Centrostephanus besnardi is a species of sea urchins of the family Diadematidae. Their armour is covered with spines. Centrostephanus besnardi was first...

Centrostephanus nitidus is a species of sea urchin of the family Diadematidae. Their armour is covered with spines. Centrostephanus nitidus was first scientifically...

Diadema savignyi, D. setosum, Echinothrix calamaris and E. diadema (Diadematidae), Heterocentrotus mammillatus (Echinometridae) and Pseudocentrotus depressus...

Sri Lanka is a tropical island situated close to the southern tip of India. The invertebrate fauna is as large as it is common to other regions of the...

Chaetodiadema is a genus of sea urchins of the Family Diadematidae. Their armour is covered with spines. Following World Register of Marine Species: Chaetodiadema...

Astropyga pulvinata is a species of sea urchins of the family Diadematidae. Their armour is covered with spines. Astropyga pulvinata was first scientifically...

Astropyga nuptialis is a species of sea urchins of the family Diadematidae. Their armour is covered with spines. Astropyga nuptialis was first scientifically...

Astropyga is a genus of sea urchins of the family Diadematidae. Their armour is covered with spines. Astropyga was first scientifically described in 1855...