Crabs are crustaceans with small, folded bodies and eyes on stalks. Crabs can be found primarily near the coasts of Sapience; however, fresh-water varieties are known to inhabit wetland regions, such as the Dun Valley swamp. A special delight of fishermen, they are commonly used as bait while the sweet meat of larger species can be found in the local cuisine of many coastal principalities such as Jaru, Shastaan, and Ashtan.
- Black crabs
- Small black crabs skitter about the underground lake below Blackrock. Opening and closing their pincers agitatedly, they can be found skittering unceasingly through the inky waters of their home.
- Blue sand crabs
- The aggressive blue sand crab is the most numerous of the few species on the desert island of Tapoa.
- Burrowing silt crabs
- These small black arthropods of the Mnemosyne Delta are difficult to spot. True to their name, they burrow into the silt of the riverbed for safety, emerging only to change position or to catch prey with their broad, stubby claws.
- Cave crabs
- Unlike their more colourful cousins, these crabs are milky white, due to the lack of sunlight in the sea caves of the Thraasi Foothills. They are known to cover themselves in seaweed for better camouflage.
- Fiddler crabs
- Blue-green fiddler crabs march up and down the Eastern shore of Sapience, avoiding sand boas and sandpipers. One of its claws is distinctly larger than the other, and as the smaller claw moves food towards the mouth, the crab appears to be playing the larger claw like a fiddle.
- Frost-mottled crabs
- The serene crabs of Valho Coast have snow-white shells speckled with navy patterns. Crystalised ice sparkles on their ligaments, causing the creatures to move about stiffly. Their blue-mottled, envenomed pincers are powerful enough to snap bone and are quite capable of knocking people off of their feet.
- Ghost crabs
- These rare albino crabs creep about silently in the tidal pools of Zanzibaar.
- Green-plated sand crabs
- the aggressive crustaceans are a deep shade of green, blending with the native mosses of Kunapi Island. Their claws or disproportionate, like those of fiddler crabs. Green-plated sandcrabs earn their moniker due to their habit of rolling sand into balls.
- King crabs
- Though identical to other crabs of the Notic intertidal regions, the enormous crabs of Ka'doloki dwarf their siblings, having massive legs and a swollen red carapace.
- Land crabs
- Giant land crabs comb the mud of Dun Valley swamp for hidden clams or dead fish. They have hard, brown shells with sharp spines.
- Mud crabs
- Covered completely in mud, this crab is difficult to distinguish from its environment in Dun Swamp. Its armored body is mutated and deformed, with pincers branching off from its front and sides.
- Putrid green crabs
- Protected by their putrid green shells, these small crabs of Grukai Swamp aggressively confront any trespassing creature with their venom-covered claws. Their azure eyestalks waggle fiercely as they snap at anything which comes near.
- Red crabs
- Waving their claws back and forth, these spiny Riparium crabs are aggressive, nipping at anything within reach.
- Red king crabs
- Gentler than his smaller eastern cousins, the wine-coloured king crab variant of Sea Lion Cove has a four-foot span. King crabs have a dominant right claw, and they wave them about as they scuttle across the beach comically.
- Rock-shaped crabs
- Though distinctly pale red and dull white, the small crabs of Ka'doloki apparently look like rocks with their crusty carapaces. They move about on four small legs with their diminutive, gleaming claws extended.
- Spider crabs
- The giant Lothian spider crabs are an old and fearsome race. Fifteen feet long, they are terrible menace of the deep, and are not typically targeted by patrons of crab buffets.