If you want details, this is how they operate:
An animal arrives dead. For example, a $20 fish. So they say, "We'll credit your account $20 for the fish that arrived dead." Cool, right? Wrong.
In order to even use that $20 credit, you have to buy another $100 in livestock from them. And the $20 doesn't go towards that initial $100 order -- you have to buy another $20 item on top of your $100 purchase.
So to get your $20 credit, you spend another $120 with them. SURPRISE! That stuff arrives dead too. So they credit you that $100.
So now you have $120 in store credit, but again, they make you spend an additional $100 (plus another $120 in items) to redeem that credit.
So you place another order with them for $220. That stuff arrives dead too.
See where I'm going with this? This same scenario happened with me and many others. In the end, everything I ordered arrived dead, they refused to just give me my money back, and they owed me several hundreds of dollars in store credit that I couldn't even use unless I ordered an additional $500 in livestock from them.
Saltwaterfish.com is a giant scam.