Special Rules
Amphibious: Mudcrabs can survive and breathe on both land and underwater. Mudcrabs must spend at least one hour a day submerged in water or take 2d6 damage.
Hard Shell: The mudcrab's outer shell gives it an armor rating of 1.

Special Rules
Small: The small size of a slaughterfish makes them harder to hit and might allow them to fit into tiny places. Their size is represented with their abilities, but they may receive a +2 bonus on ability checks if their small size would be a benefit to them, such as to Dexterity (Stealth) tests when trying to hide in a small space.