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Creature Feature: Whale shark

whale shark

Being the largest fish in the ocean (and the largest non-mammal vertebrate in the world) is just one of the surprising things about the whale shark.

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Creature Feature: Giant Ostracod

Giant ostracod

Although their name makes them sound huge, the largest species of giant ostracod only measures about an inch long. Size is relative, however: that’s more than 30 times the size of average ostracods.

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Creature Feature: Glass squid

glass squid

Glass squid spend their lives going with the flow. Literally. Filled with ammonium chloride, a solution that’s lighter than seawater, they float effortlessly through the ocean in search of mates and food.

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Creature Feature: Dragonfish

Dragonfish

Dragonfish aren’t actually dragons, but with a slender, luminous barbel hanging from their chins and glowing blue-green lights covering their bodies, this species is downright otherworldly.

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Creature Feature: Lancetfish

Piercing the darkness of the twilight zone, the aptly-named lancetfish stops at nothing in pursuit of its target. Measuring up to two meters (6.6 feet) in length, lancetfish are some of the biggest creatures in the twilight zone.

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Creature Feature: Copepod

Sapphirina copepod.

This tiny but ubiquitous zooplankton plays a superpowered role in the marine ecosystem, competing with Antarctic krill for the title of “most animal biomass on earth.”

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Creature Feature: Pelican Eel

gulper eel

While this deep-sea fish was first named after a pelican, as researchers learned more about its behavior, other names emerged. “Gulper eel” sums up the fish’s ability to expand its throat and stomach to accommodate prey.

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Creature Feature: Snipe Eel

snipe eel

Meet the slender snipe eel—a deep-sea minimalist with 750 vertebrae, jaws that never close, and an anus on its throat. In the twilight zone, weird wins.

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Creature Feature: Hatchetfish

Hatchetfish

The hatchetfish was born ready. With pelvic bones tilted downwards and large eyes pointing upwards, this little fish is poised for whatever morsel—or threat—comes its way.

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Creature Feature: Pteropod

In the weird and wonderful menagerie of the twilight zone, the pteropod stands out for its delicate grace. Fluttering through the water column on translucent “wings,” the more abundant shelled variety (Thecosomata group) are known as “sea butterflies,” while the shell-less adult Gymnosomata are known as “sea angels.”

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How are seashells made?

variety of seashells

One of the most striking features of our beaches is seashells. Their whorls, curves, and shiny iridescent insides are the remains of animals. But where do they come from?

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How do I become an oceanographer?

Like all scientists, oceanographers are curious. Students who are curious about all things ocean might make great oceanographers. So how do you become one?

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How is beach sand created?

beach

Beaches can be white, black, green, red and even pink. What creates those different colors? Why is some sand soft and fine, but other types feel rough? Where does beach sand come from, anyway?

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What causes ocean waves?

A trip to the ocean means sun, wind, and waves. Surfers ride them. Children play in them. Swimmers dive beneath them. But what causes waves?

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Does the ocean produce oxygen?

It’s easy to think of the world’s forests as the planet’s “lungs.” Trees pump out oxygen—the same stuff we breathe in. But does all our breathable air come from just land?

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Why is the ocean blue?

One idea is that it reflects the sky. But if we sink below the surface, the blue color remains. Here, the water isn’t reflecting the sky. So why is the ocean blue?

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