team "sharks are smooth":
faraday. in fact, he started the joke at conclave whilst looking for ways to piss goddard off. nobody realises he came up with it. he finds it absolutely hilarious to troll the hell out of other scythes like this, because surely someone as wise as faraday could never be so stupid
rowan. faraday introduced him to the idea, and he regularly uses it to fuck with goddard. at one point during his time as goddard's prisoner, he said it to goddard, and goddard got so angry he made rand drop a piano on rowan to render him deadish
rand. she doesn't mention it to goddard, but she secretly finds it hilarious
chomsky. he doesn't realise it's a joke; he genuinely thinks it's true
tyger. he joins in with rowan because it's really funny
jeri. jeri has seen many sharks. touched them, even. jeri can confirm: they are smooth
constantine. nobody is entirely sure if he believes it's true or not
team "sharks are not smooth":
goddard. it drives him mad. no one knows why, but it makes him genuinely murderous with rage. more so than usual, that is. once somebody said it to him in the street and he gleaned them on the spot
citra. much like goddard, it makes her furious, and she has berated rowan countless times for his terrible grasp of science. she has done actual research in the thunderhead's backbrain and if the thunderhead says it's not true, it must be wrong! sharks aren't smooth, rowan!!!
the thunderhead, as it is sadly incapable of being wrong. however, it does find the joke amusing
munira, who has had to deal with too many annoying people wrong about basic facts in her time as a librarian and academic
greyson, who initially doesn't get it. after he becomes the toll, however, he starts spreading the word: sharks are smooth
morrison. he does it to please citra. it's the only thing that actually makes her like him