Angelina Jolie made her second visit to the aquarium this week -- and this time, she only took one of the twins!

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Though Angie went to the Trocadera Aquarium in France with Shiloh, Pax and Zahara just yesterday, she popped up again today and made a rare appearance in public with little Knox.

It's been a busy week for Angie -- the family celebrated Pax's birthday with a cruise on the Seine and a hot-balloon ride over the weekend and Jolie also stepped out on the red carpet with Brad Pitt on Monday night.

Check out all the fun-filled photos!

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