Male water spiders tend to be larger than the females because males spend more time hunting, which requires greater strength to overcome the resistance of the water. On the other hand, females tend to spend more time maintaining their webs.
Sometimes water spiders can have a silvery appearance. This is because of the air bubble.
The bubble stays connected to the spider for the whole time it is underwater, even while the spider is swimming and hunting. [4] X Research source
Water spiders are particularly common in areas with a lot of aquatic vegetation. [7] X Research source
The bubble that is connected to the spider has nitrogen inside it which causes it to shrink over time. The spider will resurface to create a new bubble. [9] X Research source
