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This tentacle belongs to a blue button. While it has a central “float” with streaming tentacles like typical jellyfish, the blue button is a colony of many small hydroid animals.
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Blue Button Tentacle

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Students of the Alaska SeaLife Center delegation.
Slideshow

Teens Take Action on the Ocean & Climate

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Satellite view of Earth.
Article

Earth Day, Spawned from the Sea

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Two nurse sharks hover over a baited cage
Lesson Plan

What Drives Ocean Currents?

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Students Work on Channel Island Map Project
Article

Back to School, Ocean Portal Style

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Two nurse sharks hover over a baited cage
Lesson Plan

Learning Ocean Science Through Ocean Exploration

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Intense volcanic CO2 vents in Ili Ili Bua Bua, Normanby Island, Papua New Guinea.
Slideshow

Will Coral Reefs Survive Acidification?

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A brittle star clings to the branches of a deep sea coral
Article

A Brittle Star May Be a Coral’s Best Friend

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Seagrasses are flowering plants that can form dense underwater meadows and are an important shallow water habitat.
Overview

Seagrass and Seagrass Beds

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a sunken propeller becomes overtaken by a reef with two scuba diver in the background
Article

When Wrecks Become Reefs

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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The Indonesian Archipelago is the heart of the Coral Triangle, a biodiversity hotspot for marine and terrestrial life. This diversity forms an important part of Indonesia's natural, cultural, and economic heritage, its coral reefs alone support nearly 6 mi
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Map of Bali, Indonesia

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