绒枝藻目 （Dasycladales）为藻类之一目，归于绿藻门（Chlorophyta）绿藻纲（Chlorophyceae），同纲者尚有色球藻目（Chlorococcales） 等目。

In taxonomy, the Dasycladales is an order of large unicellular green algae in the class Ulvophyceae. It contains two families, the Dasycladaceae and the Polyphysaceae.

These single celled algae are from 2 mm to 200 mm long. They live on substrates in shallow warm marine waters, usually less than 20 meters deep. They are very large cells. They are able to attain these sizes without numerous internal cell wells because they build calcium carbonate shells around themselves.