Out of curiosity what was the intent of this comment?

1. To joke about it being irrelevant for most people to know how to fillet a fish
2. To make a troll joke about filleting something ludicrous (like saying “can you post how to fillet a unicorn next?”)
3. To make a sadistic joke about killing something that people empathize with more than a fish
4. To make a vegan statement about how killing a fish and killing a dog should be seen as equally distasteful (no pun intended) as the murder of a sentient thing
5. To ask a question because you legitimately would like to know how to fillet a dog

No judgement, I’m just fascinated by the fact there are so many different reasons someone might post a comment like this.