Is there any fish that you just cannot keep alive?

[Kenny-pr]

where I can make purchases for me to send them direct to Puerto Rico I want to make multiple purchases

 

[rockinzebra457]

Blue spot jawfish are hard for me aswell

 

[Cleo642]

I think in most cases the CUC has something to do with this.

I can't keep Bangaii Cardinals alive for some reason. I've tried 9 and only just now have had 1 survive so far. I have high hopes for this one!

I think a large fish would be hard for cuc to fully consume fast enough to where to you wouldn't notice. Idk, I find it odd. Usually you could find remnants or something. Maybe your right.