مچھلی اور دمِ مسفوح
In recent Q&A Session with Ghamidi Sahab on Questions selected from ASK GHAMIDI Platform : ( Part-2 ): For answer to your question, please refer to the video below from 1:08:31 to 1:09:53 https://youtu.be/vGKA1Bxq6es?t=4111
These all fall under the general category of fish (smaller fish) and do not have much blood as you could see from the video I shared above. The large fish which might need slaughtering that I can imagine would probably be a whale or of its comparable size.