BLACK PROJECT SIREN DELTA FIN 22.5 CM TUTTLEBLACK PROJECT SIREN DELTA FIN The Black Project Siren Delta Weed fin is conceived for extremely shallow waters like the Hatteras lagoon or other similar bodies of water. Black Project designed a fin which is short about half the length of a regular fin! The result is an amazing new weed fin which is at home in a massively wide range of conditions, range of boards, range of sail and very different riders. Thanks to the extremely wide range of use and