The mollusks (American spelling) or molluscs (British spelling) are the big and diverse phylum Mollusca, which includes a variety of acquainted animals nicely-identified for his or her ornamental shells or as seafood. These range from tiny snails, clams, and abalone to squid, cuttlefish and the octopus (which is taken into account probably the most intelligent invertebrate). There are some 112,000 species within this phylum (Feldkamp 2002).
Number Of Extant Species
The giant squid, which till recently had not been observed alive in its adult form, is the biggest invertebrate; though it is possible that the colossal squid is even larger. The nematodes or roundworms are some of the frequent phyla of invertebrates, with over 20,000 completely different described species, of which over 15,000 are parasitic. They are ubiquitous in freshwater, marine, and terrestrial environments, where they often outnumber other animals in both individual and species counts, and are present in … Read More