sea urchins
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...
Echinometridae
The Echinometridae are a family of sea urchins in the class Echinoidea.
Characteristics
All Echinometridae have imperforate tubercles and compound ambulacral plates.species are listed in the
World Echinoidea Database
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms.
Content
The content of the registry is edited and maintained by scientific specialis ...