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Mermaid in plastic: Artist Benjamin Von Wong highlights ocean pollution.

Mermaid in plastic: Artist Benjamin Von Wong highlights ocean .

A baby dolphin seen with marine debris wrapped around its neck near Cairns.

Baby dolphin spotted with marine debris wrapped around its neck could die, expert says.

Schools of bluestriped grunts (Haemulon sciurus) and schoolmaster snappers (Lutjanus apodus) fill the space between broad branches of elkhorn coral (Acropora palmata). Fast growing but fragile, elkhorn coral is a critically endangered species. It has virtually disappeared throughout most of the Caribbean—but populations of it remain in the Gardens of the Queen. Credit: David Doubilet and Jennifer Hayes

Cuba Diving: Will Gardens of the Queen, a sprawling marine reserve, be threatened as the island nation opens to U.

Trash Bags by artist / designer Mariapia Malerba

Trash Bags by artist / designer Mariapia Malerba

"Exhausting machine" Our latest painting realized in Vancouver (CA) for @vanmuralfest  #nevercrew #vanmuralfest #vancouver #canada #contemporaryart #streetart #muralart #urbanart #urbanintervention #plasticbottle #polarbear #alert

"Exhausting machine" Our latest painting realized in Vancouver (CA) for NEVERCREW

The rare green sea turtle, shown here on a volcanic beach in the Pacific, made a mysterious reappearance on Bermuda's shores in 2015. (GeorgeBurba / iStock)

The Strange Reappearance of the Once-Vanished Green Sea Turtle It's a conservation biology riddle wrapped in a mystery inside a hard shell.

This whale was born white. Now, he's a brindled beauty! A grey morph southern right whale photographed by the Marine Conservation Program in 2012. Image: WhalesTas/Facebook

Ariel view of the rare “grey morph” southern right whale.

A deep-sea coral provides habitat for an orange anemone. Credit: NOAA Okeanos Explorer Program. After years of work by NRDC and its partners, about 5,000 square miles of ocean—with massive canyons, majestic underwater mountains, and more than 1,000 species—have received permanent protection.

After years of work by NRDC and its partners, about square miles of ocean—with massive canyons, majestic underwater mountains, and more than species—have received permanent protection.