Aquarium closing times vary depending on the specific aquarium and the season. Here are some examples:

• Bristol Aquarium closes at 4 pm to 6 pm depending on the season, with the last entrance an hour before closing.
• Texas State Aquarium closes daily at 5 pm.
• National Aquarium is open until 5 pm daily, with last entry at 4 pm.
• Downtown Aquarium in Denver closes at 8 pm.
• Aquarium Berlin closes at 6 pm, with last admission at 5 pm.
• Blue Planet Aquarium closes at varying times depending on seasons; last entry is always one hour before closing.
• SEA LIFE London closes at 7 pm with last entry at 6 pm.
• SEA LIFE Sydney Aquarium closes at 5 pm with last entry at 4 pm.
• Georgia Aquarium and Ripley’s Aquarium of Canada have varying hours, generally closing between 5 pm to 7 pm.

If you specify the aquarium you are interested in, I can provide the exact closing time for that location. Otherwise, aquarium closing times generally range from 4 pm to 8 pm with last entry typically one hour before closing.