Aquarium of the Pacific (Long Beach) is a real time commitment — fit it in only if it's a priority.
Allow 2-3 hours.
A well-run, hands-on aquarium focused on the Pacific — sea otters, a shark lagoon, big touch pools, and a walk-in lorikeet aviary that's a near-guaranteed kid magnet. What makes it worth the Long Beach drive over staying central is that it's a genuine half-day destination you can pair: it sits on the Long Beach waterfront steps from the Queen Mary and the harbor, so families can build a full day around it rather than treating it as a one-hour stop. If you're not traveling with kids and won't combine it with the waterfront, it's hard to justify the drive from central LA.