This swarm of spiders appears like a torrent of black death on the water.
Skate Spider Swarm CR 6
Speed 30 ft.
Melee swarm (2d6)
SA distraction (DC 14)
Space 10 ft.; Reach 0 ft.
Organization solitary or family (2-10)
A full grown skate spider lays an egg that can hatch up to one thousand of these monsters. Young skate spiders lack a venom sack and cannot poison their prey. As such the young rely on numbers to hunt for food and for mutual protection. Their swarms form the basis of many River Nation tales of horror. Once they have grown to small size, they are mature enough to hunt on their own.
Book of Beasts: Monsters of the River Nations, copyright 2010 Jon Brazer Enterprises; Author Steven Helt.