After having kept jellyfish as pets (Atlantic bay nettles), I wouldn’t really consider them to be vegetarian nor vegan. While similar to plants, seemed to have a greater sense of environmental awareness than my plants. Mine could sense light, have “off days”, and interact with their environment. It’s probably true that there’s not much going on there due to the small amount of nerves that control everything, but even when mine would accidentally get caught on tank cleaning tools or get bumped around they’d react in a protective way and to me it’s just similar enough to animalistic behavior that I’d not feel comfortable consuming them if I were vegan.

So is this theory of veganism to not cause pain to an animal? If so what about ethically sourced meat. Like bullet to the head/decapitation. Most of those creatures feel nothing, they just end.

Or is it to not eat anything that comes from the an organism from the Animalia kingdom because harming animals is immoral?

After proofreading, these sound more aggressive/argumentative than i had intended but they get the point across.

Veganism means to reduce the suffering and exploitation of animals as much as practically possible.

There is nothing ethical about killing a living being that doesn’t want to die.