Talk:Carnage VS Lucy/@comment-26576229-20180809013459/@comment-3463132-20180809022740

They can't be seen. There are multiple times in the manga where we see from Lucy's POV (she can see her vectors) and then see the same scene from a human POV- the vectors are not visible at all.

Not only that, but a vector going right through someone will not leave a hole, they're intangible unless they destroy. For example her vector can pass through a human, extract his heart, pop out the other side with the heart but leaving no hole in the torso, and then explode the heart.

From a human POV, the heart just shows up outside his body and then explodes, for no reason.

As for his Spider-Sense- I didn't see any showings for it when I looked at respect threads. It's possible he doesn't even have one- that was something Venom specifically got from his time with Spider-Man IIRC- not a standard Symbiote thing.