Why can't fish be raised in the bedroom?

When fish are raised in the bedroom, the water in the fish tank will evaporate and the air humidity in the bedroom will increase. The bedroom is where people rest at night. In cold weather, if people sleep without a quilt, they are prone to catch a cold. In addition, people will easily get rheumatism or rheumatoid arthritis. In addition, the indoor air is humid, and quilts and bedding are easy to breed germs or molds, which is easy to cause allergic reactions.