Studies have shown that animals can increase longevity after heart attacks, lower cholesterol, and even predict seizures in people.

Other studies have found that people who watch fish in aquariums have a notable decrease in blood pressure. There was also a trend for aquarium watchers to have a decreased pulse rate and decreased muscle tension. In yet another study, watching fish in an aquarium was found to be as effective as hypnosis in reducing anxiety in patients awaiting dental surgery.

Studies going back as far as the late 80’s have shown that gazing at aquarium fish reduces stress and subsequently lowers blood pressure.

Fish Make a Difference - Researchers have compared the effects of hypnosis vs. an aquarium, fishless vs. fish filled aquariums, and no aquarium vs. having an aquarium. In all cases, having some sort of aquarium reduced blood pressure. Interestingly enough, greater reduction in blood pressure occurred when there were fish in the tank, vs pleasingly decorated, but fishless, tanks. Even watching a video tape of fish has been proven to have therapeutic effects.

Especially good for seniors, children, patients inside clinics and people in waiting rooms:

Seniors who were provided with an aquarium filled with fish had significant blood pressure reduction.

Watching fish has been shown to calm children who suffer from hyperactivity disorder. Dental patients who were subjected to hypnosis vs. an aquarium experienced the same or greater benefit from the aquarium. Other studies have shown that dental patients required less pain medication after having watched fish in the office. It's little wonder that physician offices, dental clinics, and even waiting rooms for counselors have traditionally kept an aquarium in the waiting room.