There are some spiders that live in the water. They don’t have gills but they do have a really neat way of breathing. The spider will spin the web on the water surface and collect air bubbles to fill it from underneath. The spider can then pop up under its web and breathe when it needs to. These spiders also mate and lay their eggs in the ‘air bubble web’.
These spiders can be found around, and often in, lakes, ponds and streams, floating on sticks and leaves.