n large fungus mindless ooze 

Perception +6; motion sense 60 feet, no vision

Skills Athletics +7, Stealth +6 (+8 amid decaying plant matter or fungus)

Str +3 Dex +0 Con +5 Int -5 Wis +0 Cha -5

Motion Sense An amoeba swarm can sense nearby creatures through vibration and air or water movement.

AC  12; Fort +11, Ref +3, Will +4

HP 60

Speed 10 feet, climb 10 feet

Melee [>] pseudopod +8, Damage 1d8+3 bludgeoning plus slime rot

Slime Rot (disease) Saving Throw DC 18 Fortitude; Onset 1d4 days; Stage 1 enfeebled 1 and sickened 1 (1 day); Stage 2 as stage 1 (1 day); Stage 3 drained 1, enfeebled 2, and sickened 2 (1 day); Stage 4 as stage 3 (1 day)

Bestiary 2, page 193. Expanded in LOIL.