Heal the Bay Aquarium, previously named the Santa Monica Pier Aquarium, is a private-public aquarium at a California State Beach Park managed by Los Angeles County Department of Beaches and Harbors, located beneath the Santa Monica Pier, adjacent to the Pacific Ocean. Since 2003, it is operated by Heal the Bay, a nonprofit organization. It was formerly known as the Ocean Discovery Center and was operated by UCLA until 2003.

As Heal the Bay's marine education, advocacy, and community science facility, it is open to the general public and attracts more than 100,000 visitors from around the world per year (approximately 15,000 are students). This facility offers educational programs, activities, and special events dedicated to marine conservation, pollution prevention, and environmental education.

Species on display include:

Chordata Sarcastic Fringehead Swell Shark Horn Shark Leopard Shark Round Stingray Thornback Ray Black Sea Bass Garibaldi California Moray Eel Giant Kelp Fish California Halibut Shiner Surfperch Blacksmith Cabezon Sargo California Scorpionfish C-O Turbot Treefish

Arthropods Sheep Crab Kelp Crab Hermit Crab California Spiny Lobster Molluscs California Two-Spot Octopus Red Abalone Chestnut Cowrie Kellet's whelk Giant Keyhole Limpet California Mussel Norris's Top Snail

Echinoderms Bat Star Ochre Sea Star Brittle Star Purple Sea Urchin Sand Dollar California Sea Cucumber Cnidaria Club Tipped Anemone Tube-dwelling Anemone

In February 2009 the two-spotted octopus managed to manipulate the pipe connection that takes care of draining the water tank. Two hundred gallons of water from the valve flooded the visitor space. The event received significant media attention.

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  The California moray is one of the featured local species on display.
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  This California two-spot octopus is 3–4 months old.
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• Official website
• Heal the Bay