To identify predicted target genes of zebrafish miRNAs, have a look here http://www.targetscan.org/fish_62/
If you want to correlate the expression of miRNA promoters and predicted target genes (the ones you get from above data), you can use zebrafish CAGE-seq datasets to see how miRNA/target genes correlate across developmental stages.
You also have access to histone modifications and RNA-seq data from same stages. You can visualize data from UCSC custom track here: http://genome-euro.ucsc.edu/cgi-bin/hgHubConnect?hgsid=218695066_W0Xr4VlL7iBMcdhAvDjYAfPTS5Na
Click "Promoterome CAGE and nucleosome positioning" to visualize tracks on UCSC browser.