Crabs are a sapient, non-humanoid race in the Big Blue. Native to Cerulea, Crabs are a long-lived, perhaps not fully mortal species, and as such, they often appear as guides for adventurers. They are somehow able to visualise and understand the way that Change behaves, and live in harmony with it. They also seem to be connected to The Builders and their society, commonly being found in or around Builder ruins and being able to read their language.
Crabs speak a language called Crabish, which, to everybody else, doesn't sound any different from random clicking and snapping. However, whether through pure linguistic insanity or by the use of magic to interpret their language, those few mortals who can understand the Crabs are able to access their knowledge and wisdom to aid them in their journey.