I know it's been said before in other threads, but I hate ressurecting old threads for 2 reasons:
1) I've been told it's annoying and
2) It doesn't get your point across the same way I think. Should ask for opinions on that sometime
So, anyway, boats! Or ships. Perhaps being produced with one or more biped crafting schools, probably existing ones; maybe with some minor components made by dragons too.
Perhaps farther out to sea, there would be more elusive high-tier fish or such that confectioners can gather or such. You could have two types of boat--a simple fishing boat which would be sorta more basic to make, and ships, which are completely higher-tier material. If there was a way to limit how far out they could go, maybe fishing boats could go a little way off shore and ships could go anywhere at all on the sea. :P
I'd also think only bipeds would be able to board. :O
I suppose there might also be a way to tie this in with having specificaly biped-areas, if there were islands without portal that you had to enter via ship, so flying dragons couldn't get in.
It'd probably never ever happen, and to be honest I don't ever expect it to, but it's still a nice something to think about :P
~Galde