Underwater spider webs made of slime?
I am imagining a race of spider-like creatures that remain still in the water. They glow to attract prey/would be predators. They surround themselves with a thick layer of slime that can catch creatures much larger than them. I need my creatures, however to be able to quickly get through their own cloud of slime. It has to be able to restrain a shark and they have to be no larger than a cat.
They kill their prey with venom injection via biting.
How can my creature evolve to meet these criteria? What is this slime made of? How can my spider get through it?
Edit:
The multiple types of spiders exist at various depths, although I am trying to figure out how the deep sea ones would work.
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