

Plastic trash floats in the waters off the Smithsonian's Carrie Bow Cay field station, in Belize.
Laurie Penland

Looking for more Earth Day ideas? Visit the EPA’s “Pick Five for the Environment” website.

These corals are still in recovery after a mass bleaching in Panama, in the summer of 2010. You can see some bleaching on the tops, but the sides are looking good.
Amanda Feuerstein

Boats trying to control the fire on the Deepwater Horizon oil rig on April 21, 2010.
U.S. Coast Guard

One fish, two fish, red fish, blue fish. Your poem for the ocean is what we wish. Conjure your inner Dr. Seuss or Walt Whitman.
Louiz Rocha

The North Carolina Aquarium delegation visited Baldhead Island, a barrier island near Wilmington, N.C., to observe and learn about the effects sea-level rise firsthand for their Student Summit project.

This Chesapeake Bay shoreline may look picturesque, but the plant that dominates it is an invasive strain of Phragmites australis. The plant has invaded wetlands along the East Coast.
Melissa McCormick

Researchers study the behavior of killer whales and how they react to sonar.
C. Kyburg; Obtained under NMFS permit #14534

Home is where the hull is: Since the dawn of seafaring, humankind has had to deal with pesky creatures, such as barnacles, that “foul” ship hulls and boat propellers like this one.
Flickr User Alison Domzalski (Creative Commons)
