One suggestion. Around here, the formal invitation would not include the details you are showing about the reception and the arrival details and suggestions. The invitation would give the basic information with any frills you may wish to use. There would be a second sheet with directions, details and suggestions with regard to the aquariam. The invitation itself would read something like this:
Me
and
Him
request the honor of your presence in
celebrating the beginning of our new life
together as we are joined as husband and
wife.
The harmony of love meets with the melody
of life joining the reverie of captivating images
and compositions of the tranquil sea
Sunday, the first of March
Two thousand and nine at
seven o'clock in the evening via
The Big Fancy Aquarium.
Cocktails, intimate seated dining and
merriment will follow.
The other information would be on the other coordinating card that would be enclosed behind the invitation. The beauty of this is that it is your wedding and you can do it any way you want!! These are just suggestions as you requested.
Wishing you the very, very best!!!