[jason taylor]

There is a Traveller race of sentient squids that is almost like humans in psychology. Except where it touches environment; for instance they are more likely to have paronoia about pressure then heights.

Other environment-specific qualities can be thought. Language and Mythopoeia can be adjusted. What if their metaphor for thinking is "feeling the currents?" Or what if their idea of domesticity is a rock upcurrent and their idea of terror is a rock downcurrent? What if they have customs and linguistics related to salinity?