| Vryonisi | |
| Native Name: | Βρυονήσι |
| Native Name Lang: | el |
| Coordinates: | 35.1297°N 25.7628°W |
| Map: | Greece |
| Archipelago: | Cretan Islands |
| Country: | Greece |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Crete |
| Country Admin Divisions Title 1: | Regional unit |
| Country Admin Divisions 1: | Lasithi |
| Country Admin Divisions Title 2: | Municipality |
| Population: | 0 |
| Population As Of: | 2001 |
Prasonisi, also known as Vryonisi,[1] is an uninhabited Greek islet, in the Aegean Sea, close to the northern coast of eastern Crete. It is extremely small, measuring just 0.034km2 in area.[2] Notably, there is a shipwreck on the islet's southern side, over thirty metres beneath the sea; the ship itself is broken up and possibly buried but remains of pottery, including amphorae, have been reported. Various species of sea snail have been recorded living on and around the island. The island itself is mostly covered by salt-tolerant plants.