[citation needed] A number of botanists have proposed division of the species, but currently three subspecies and one variety are recognised:[5] It is distributed along Africa's east coast, south-west, south and south-east Asia, Australia, and northern parts of New Zealand.It is one of the few mangroves found in the arid regions of the coastal Arabian Peninsula, mainly in sabkha environments in the United Arab Emirates,[6] Qatar,[7] Bahrain,[8] Oman,[9] as well as in similar environments on both side of the Red Sea (in Yemen,[10] Saudi Arabia,[11] Egypt,[1] Eritrea,[12] and Sudan),[13] and Qatar[14] and southern Iran[15] along the Persian Gulf coast.[18] In Australia it occurs in every mainland state and extends much farther south than other mangroves, with its southern most limit at Corner Inlet (38°45′S) near Wilson's Promontory in Victoria.This colonisation of southerly climes may have occurred relatively recently, perhaps several thousand years ago, when they were transferred by the Leeuwin Current.[citation needed] In South Australia along the Barker Inlet and Port River in Gulf St Vincent, as well as in sheltered bays in Spencer Gulf and the west coast of Eyre Peninsula, A. marina forests form hatcheries for much of the state's fish and shellfish commercial and recreational fisheries.