We couldn’t check in until 3pm so we went to the Lisbon Aquarium. It has a huge tank at its center full of different types of fish, sharks and rays, plus smaller exhibits around that central one.

For movies of the large tank see https://youtu.be/SBC_9V9rrJQ, sea dragons https://youtu.be/F-t5s-fthb4 and jelly fish https://youtu.be/HrtDc4iMdRE .