Angry Fish Inhabit Most Home Aquariums

Home fish tanks and aquariums may at first appear to be tranquil environments, but look closely and you might see a glaring goldfish or a ticked off tetra. A new study has found that ornamental fish across the U.S. -- all 182.9 million of them -- are at risk of becoming aggressive due to cramped, barren housing.
In other words, fish can turn mean when their home sucks, according to a new study in the Journal of Applied Animal Welfare Science.   link