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Today's Hours: 9:00 am – 6:00 pm


Come explore the intriguing world of sea jellies at the Aquarium. Find out the fascinating truth about these beautiful yet mysterious animals and their importance to our ocean planet.

Moon jellies in cloud shape

Aquarium of the Pacific/Robin Riggs

Helvola sea nettle

What is a Sea Jelly?

Jellies and comb jellies have lived on Earth for at least 500 million years, making them three times as old as dinosaurs. Sea jellies survive without a heart, brain, or lungs. They are 95 percent water, and their movements are governed by the flow of the water they live in.

Japanese Sea Nettle

Importance of Jellies

Jellies play an important role in the ocean as food for other animals, like sea turtles and mola molas. Humans also rely on jellies for food and other uses. They are also considered an indicator of ocean health.


Sea Jelly Gallery

The Aquarium has been home to several species of sea jellies and comb jellies. Some of these are pictured below.

Comb Jelly on Blue Background

Jelly Husbandry

The Aquarium’s aquarists have successfully cultured several species of jellies for many years. In protected environments such as aquariums, jellies can live longer than their lifespans in the wild because of the absence of predators and the availability of an adequate food supply.


Jelly Conservation

Humans have found many uses for sea jellies, but human activity is changing ocean ecosystems, affecting jelly reproduction and habitats and potentially reducing their populations in the wild.


Jelly Reproduction

While sea jellies have the simplest anatomy of almost any animal, they have complex and varying lifecycles and reproduce both sexually and asexually. Different jelly species reproduce in different ways.

Sea jelly

Webcam: Sea Nettles

Found along the coasts of California and Oregon, these sea jellies feed on small fish and plankton that come in contact with the jellies’ stinging tentacles.