Metapenaeus bennettae is a species of small prawn found in eastern Australia, where it is called the greentail or greasyback prawn. The prawns are covered in fine hairs, giving them a slippery feel when handled. They are collected commercially and recreationally for food and form part of the catches known as bay prawns and school prawns.

Names The term "bay prawn" may be listed as a common name for M. bennettae. Bay prawns most generally refer to mixed catch of small prawns from Moreton Bay and other Queensland fisheries. More particularly, bay prawn may be taken to mean M. bennettae and M. insolitus. (See #Commercial use.) "School prawns" are small prawns netted in rivers and estuaries. These are primarily M. macleayi in eastern Australia and M. dalli west of Cape York. Consequently, those two species may be referred to as Eastern School Prawn and Western School Prawn. However, the term school prawn is also applied informally to other species, including M. bennettae.