Aquarium weight load on floor.

I recently purchased a 90 gallon aquarium and want to use it as a
partial room divider between my living and dining areas. My question
is, do I need to give any consideration to load weight on my floor
joists. My tank is only 18 inches wide and the proposed location of the
tank runs parallel with the joists so it is possible it could be above
only one joist when it is set up.