what happens to the spiricles when the spider is on the water?

Question: what happens to the spiricles when the spider is on the water?
- Keywords:
  fen raft spider,
  spider,
  spiracles,
  water
Asked by umaimah12 to Fen Raft Spider on 23 Nov 2017.
- Fen Raft Spider answered on 23 Nov 2017:
  
  I breathe through my spiracles and so need them to have access to air at all times. This is easy enough when I am skating across the water, as they are on my abdomen (back segment) and so are sticking out of the water into the air. When I dive into the water to catch food or escape from predators the hairs on my abdomen actually allow me to breathe! These hairs repel water and so trap air in a bubble around my body, allowing me to breathe as normal.

Question: what happens to the spiricles when the spider is on the water?