|
They're web-spinning spiders so they'll use their normal tactics, which are to web everyone then move in and bite, let their poison work, then eat their helpless prey.
Two things of note: this is a season 0 scenario so the monsters are using d&d3.5 stats and the large monstrous spider does not translate directly to pathfinder (different CR), so you use the 3.5 stat block. Second, being webbed doesn't necessarily make a PC helpless. They have a chance to break free, and there are some explosive supplies in the ship's hold that will burn away webs.