Autor: Edgar Raymond Banks

Sea urchins play a key role in marine ecosystems, controlling through its grazing activity the dynamic, structure and composition of seaweed and sea grasses. Moreover, it is a crucial component of th …

Gastropods are a large taxonomic class within the molluscs, a group of animals that are more commonly known as snails and slugs. With more than 30, 000 living species worldwide and about 15, 000 foss …