[BiO BB] Fish genomics

[Nagesh Chakka]

Hi All,
I just started work with fish genomes for my comparative study. I am a 
bit puzzled as to why three different fish species were selected for 
sequencing (Danio rerio </Danio_rerio/>, Fugu rubripes, 
</Fugu_rubripes/>and Tetraodon nigroviridis). Is there is any advantage  
in each of these species selected for sequencing which is not there in 
the other? I am addressing this question to this forum as I have a 
feeling that someone out there may be working with fish genome and may 
be having extensive information about what I was looking for. Please 
also note that I could not find any straight forward answer to my 
question searching the web. </Tetraodon_nigroviridis/>
Thanks
Nagesh