Where can I get ensembl Medaka genome for RNAseq I am trying to map a RNA-seq dataset using ensembl genome for medaka fish. 

From here http://uswest.ensembl.org/Oryzias_latipes/Info/Index

when I click on a Download DNA sequence (FASTA) I am forwarded here ftp://ftp.ensembl.org/pub/release-98/fasta/oryzias_latipes/dna/

where I have a huge number of .fa.gz files and I am just looking for a single file, that I can use. 

While when I am downloading medaka genome from NCBI (and using this technique) http://www.metagenomics.wiki/tools/fastq/ncbi-ftp-genome-download I have my ncbi genome in one file.

How can I get an ensembl genome in one file?
Download the ones without a chromosome number in the filename. Those files are the whole genome.