Things forbidden to Jews are fine for J W’s , “ old law done away with” by Christ.
When I read yesterday’s thread about Horshoe crab blood in medical use it , made me think that they don’t care about fish blood - even large fish like salmon and halibut . An angler may bleed one but commercial fishing does not.
Since The Bible does not mention fish in the blood prohibition and Jesus is recorded as eating fish, I guess that is why they are happy with it.......... Thankfully.