Although I don't think it's been definitively proven, there is evidence to suggest that language is shaped, at least partially, by the physical landscape the speakers are using it in. 1 2
I'm preparing to work on a constructed language for a fictional culture that exists primarily at sea. I haven't yet determined if it will be a pidgin/creole or a separate language all it's own, but I am wondering how the sea/ocean itself will affect its phonology. If high altitudes encourage the use of ejectives (3), are there any particular sounds that low altitude and high humidity would encourage or discourage?