The terms “shrimp” and “prawn” have no definite reference to any known taxonomic groups. Although the
term “shrimp” is sometimes applied to smaller species, while “prawn” is more often used for larger forms,
there is no clear distinction between both terms and their usage is often confused or even reverse in
different countries or regions. Therefore, no attempt has been made here to restrict or define their meaning.
Certain other crustaceans, such as the “mysid shrimps” (Mysidacea), “mantis shrimps” (Stomatopoda),
and “mud shrimps” (Thalassinidea), are taxonomically not true shrimps.