In my previous post, I said I was allergic to crabs. I don't actually know if that's true, because I've never eaten one; the claim is based on the fact that all three of my siblings are - violently so - so I never felt the need to test it. Perhaps that's why I've never explored the moral implications.
That said, many times I've seen the claim that most animals that become seafood don't have nervous systems supporting feeling pain the way that we do. If my food didn't suffer, that would be a comfort to me; however, I'm not sure I believe that claim (and especially not the moral excuse it tries to provide).
I have been with friends who fish in catch-and-release environments. The only time I participated in one, I was a child and didn't really know what it entailed beforehand (and, to my relief, didn't catch anything). If fish truly aren't sentient and can't feel pain, then there's no reason to object; but the idea of being spiked through the cheek, pulled from my atmosphere, suffocating for a while and then being returned - with no comprehension of what happened - is pretty horrifying.
I know it was a long post, but I was just pontificating because I don't have an objectively defensible answer to your question, other than perhaps if I ate crabs ever I'd feel more qualms. Truth be told, I don't often feel those qualms about beef or chicken or other land bound meat, I just have more opportunity to.
That Chinese place sounds very upsetting, if real. Hopefully you still enjoyed the linked video.
Also, I see your instance is separate from mine, but given the recent drama over veganism on my instance perhaps we should exercise caution in our conversation!
Old.