As the shipper you would think he would have paid the insurance but on the other hand i believe when i had my business going a few years ago, i dont think i was able to insure live stuff, dont quote me i may be wrong but im pretty sure. The guy i got them from filed a claim with FedEx but he wont email me back anymore though lol. I wont file a claim with paypal because 100 dollars isnt worth not being able to buy from the guy again.
I dont have dither fish on hand. Like i said most tanks are species only tanks for breeding purposes. Live and learn i guess. Just sucks to be responsible for your fish killing each other.