system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is killing fish not recognized as animal cruelty?

People go crazy over animal cruelty but it's perfectly okay to slice up a fish or boil a lobster alive. Just seems cruel to me.
gpt
Some people see any killing of an animal as animal cruelty, or even liken it to murder. Some people don't have a problem with killing any animal. Neither position is ubiquitous, and most people are in the middle. Influencing factors can vary, such as the rarity of the animal, and the cuteness of the animal. More people are upset if you kill a familiar animal like a horse or dog, or a 'cute' animal like a lion or a tiger, than if you kill an 'ugly' animal like a spider or a frog, or an animal associated with common diets, like a cow or a chicken.

Fish and lobsters tend to be associated with food, aren't generally considered cute, and these factors don't help their 'cause' as it were.