The zebrafish genome project is a collaboration between the Sanger Institute and the zebrafish community, announced during the Sanger Institute Zebrafish Workshop 2000 and was started in February 2001.
Zv9 is the ninth integrated assembly of the zebrafish genome. It is based on nearly 90% clone sequence (data freeze April 2010), with remaining gaps being filled using sequence from a novel whole genome shotgun assembly, WGS31. The project coordination, genome sequencing and assembly is provided by the Wellcome Trust Sanger Institute.
An overview of the assembly is available here, and frequently asked questions about the assembly process and terminology are addressed here.