It depends on what you mean by "pool beetle" as there are many types of bugs that you will find in your pool. Not all bugs will bite, but some will.
When you say "pool beetle" I am assuming that you are referring to the colloquial term "pool beetle" or "pool bug" which is commonly used to refer to beetle-like bugs that are often found in abundance in pools in the Northeastern United States. These bugs are often brown or yellowish in color with black spots. They resemble ticks, but are not arachnids. They are actually a type of scarab beetle. The short answer is YES - they DO bite, and it is painful but not harmful to human beings.
I myself was bitten by one of these small beetles when I was a kid. It drifted over to me and when it made contact with my arm, it clamped down with its pincers. I had to swat at it twice to get it off, as it was holding on to my skin. The bite was initially sharply painful, and left an irritating, skin-colored welt at the site of the bite that became red and flat after several days before going away.
These beetles will often be found in large masses in the pool skimmer/filter. Like Junebugs, which congregate in large amounts, they will fall into the pool at night, or land on the surface of the water and begin to swim, usually getting caught in the skimmer.
The two most common biters in pools to worry about are water boatmen and backswimmers. Both bugs resemble each other and thrive in the pool environment, requiring a chlorine "shock" treatment to be removed from the pool. They can be identified by their slim, stick-like bodies with exceptionally long legs for swimming. Their bites are painful and can cause problems for humans that are bitten by them, especially for those that may be allergic to the bite.
Most of the Hydrophilidae or water beetles are to small to bite, but the larger species might bite you, like beetles from the genus Dytiscus.
YES
Yes
they bite when feel threatened.
No, fire beetles are a type of beetle that does not bite. They are named as such because they are attracted to fire and need it to breed.
No. Beetles don't bite and they are not poisonous.
Black carpet beetles don't bite or sting humans, so they're not harmful in that way. They are harmful to your home and possessions though. The larvae of these beetles will eat through the carpet, the padding on furniture, and fabrics such as wool and silk.
Yes, all of the subfamily Dynastinae will bite when cornered
no,they don't bite
Spiders, grasshoppers, beetles, and etc.
I caught and played with these beetles when I was a kid. I do not remember if I ever got bitten by them.
Stag beetles are not bad insects. They are basically harmless. Stag beetles may bite a human if they are provoked, but it will only feel like a slight pinch.