I've seen people picking off oysters off the rocks, opening them with a knife and eating it raw and alive. Apart from being gross and nearly making me vomit, something just didn't feel right about it, like there was something more. Oysters grow pearls when a grain of sand starts irritating their flesh, and the pearl acts as a buffer to stop the irritation. Biologically speaking, a single grain of sand shouldn't cause enough irritation to actually cause harm and injury, but for some reason they've developed a defense mechanism. Possibly to guard against pain? My response was that according to science they don't know for sure if they feel pain. And I shudder to think of tests being carried out to determine whether or not they do. I think even if I'd ever eaten seafood (which I haven't, I'll admit), I would have stopped when I became vegan. To me they're animals. Call it an energy thing, call it a "science doesn't know for sure so I'll be on the safe side and not eat them" - call it whatever. Something to me just didn't seem right watching them being eaten. As far as I know, plants respond to stimuli biochemically, and that seems right to me, and it's not something I doubt. I don't feel right about seeing trees cut down, or large branches coming off, and in a form of speciesism I don't feel bad about eating vegetables, or seeing crops being harvested. I don't get a creeped out feeling from that. But for some reason I feel sorry for oysters/shellfish. Probably because it was only recently that I found out that there was debate that they could even feel anything. When there are nerves, there's the ability to feel pain as pain is such a primitive response. To respond to pain and an organisms response to the pain, is more dependent on how complex an organism is. Basically, an oyster can't do very much. They probably don't have biochemical mechanisms to trigger hormones in response to pain, they can't scream, they can't run away, and they probably can't form a conscious thought after feeling it. All they can do is grow a pearl. Scientists can't measure pain itself - only guage responses to pain, and from that guess the level of pain.
edit: I'm not convinced earthworms don't feel pain. I've seen them accidentally cut by a spade. They don't exactly just lie there completely still...
@Hanazono, wow. I never realized what I thought or felt defined what veganism is. but thanks for the compliment. And yes, I choose to take it as that. And I choose to refuse to eat something if I don't feel comfortable with it. Tell me it's vegan, make the rulebook say eating oysters is considered vegan - whatever. I still won't eat them.
"Explain your ideas" to me that means explaining MY ideas and why I have one about something. I wasn't asked "can you please show me concrete evidence that they feel pain and therefore do you understand that it's nothing to do with veganism if they get eaten?" I explained my feelings about it, and it's up to someone else whether or not they think the same thing and want to include it in the definition of veganism. For all I know my thoughts about it are outside of veganism, therefore don't matter to other vegans, but she asked for people's thoughts and even more specifically would I personally eat them. If I choose not to because of what I think and how I feel about it, I fail to see how that means the sky's falling on our heads.