Swarm, Crab

Swarm, Crab (CR 4)
Diminutive vermin (aquatic, swarm)
Init 12; Senses darkvision; Notice 10
Defense
AC 18, flat-footed 16
(+2 Dex, +2 natural, +4 size)
HP 38 (7d8+7)
Fort +6, Ref +4, Will +2
Immune emotion, mind, swarm traits
Offense
Speed 30 ft., swim 20 ft.
Melee swarm (2d6)
Space 10 ft.; Reach 0 ft.
Special Attacks distraction (F-DC 14)
Statistics
Str 1, Dex 14, Con 13, Int —, Wis 10, Cha 2
Base Atk +5; CMB —; CMD —
Ecology
Environment marine
Organization solitary, pair, or wave (3–8 swarms)
Treasure Value none

Crab swarms contain over a thousand normal-sized crabs that rush over their victims, plucking flesh with thousands of pinching claws. Some fishermen claim tides and phases of the moon cause these creatures to swarm as they do.