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Roundhouse Aquarium is a 501(c)(3) non-profit organization managed and operated by the nonprofit oceanic and environmental organization Oceanographic Teaching Stations, Inc.

Here’s our Tax ID #: 95-3409019

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Located at the end of the Manhattan Beach Pier
P.O. Box 1 Manhattan Beach, CA 90267

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310-379-8117

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September through March

Monday-Friday: 2PM – 5PM

Saturday-Sunday: 10AM – 5PM

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April through August
Monday-Friday: 2PM – 7PM
Saturday-Sunday: 10AM – 7PM

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