Giant Spiders

Giant spiders come in a few varieties.

Black Widow spiders will attempt to web your ship (roughly 100-150 range on their webs; unless everyone's at the top of the deployment box, someone will likely be in range) and then send up their young. Figure that you'll be defending against mecha-spiders, so pack several guards & overstaff the ship if you've got one in mind to handle the fighting.

Wolf spiders try to web the ship & pull it down to attack in melee. The web is fairly strong but multiple ships' fire can handle the spider before it can cause serious problems. Ships built for melee, like saw blades or flamethrowers, can make the process go more smoothly.