Hi, I need to downlaod a reference genome file for zebrafish genome. I have tried the recent assembly (GRCz11) from Ensembl and USCS (in compressed file format, fa.gz). The thing is the file I have downloaded from USCS did not work in STAR Aligner. In addition, there is no such file in Ensembl including all the chromosomes in one file, they are all seperate. The problem is that I am not a RNA-seq expert, and I am not sure to add all the fasta files of chromosomes in one file and use it. I am not sure whether it will work or not. My question is, do you know any other database that I can download the primary assembly file of zebrafish genome (all chromosomes in one fasta file). If not, what would your suggestion be? Many thanks!