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Images: Does Oil Affect Animals' Cellular Machinery?

WHOI biologist Ann Tarrant and postdoctoral fellow Adam Reitzel select starlet anemones (Nematostella) to examine under the microscope. Reitzel collected the anemones from many locations and keeps them in glass culture dishes, where they grow, thrive, and reproduce. (Photo by Tom Kleindinst, Woods Hole Oceanographic Institution)

Starlet anemones live in salt marshes from Canada to the Gulf of Mexico, feeding on tiny animal plankton. WHOI biologist Ann Tarrant and WHOI postdoctoral fellow Adam Reitzel traveled to Louisiana marshes to look for the anemones in areas affected by the BP oil spill. (Photo by Matthew Jenny, University of Alabama)

A DNA microarray from the starlet anemone Nematostella. Each dot on the grid represents a DNA sequence from the anemone. The dots glow yellow (from a light-emitting dye) if an animal has activated (expressed) that particular gene. Biologist Ann Tarrant and colleagues will use this type of array to determine what genes are activated in anemones exposed to oil. (In this "validation" array, called a salt scan, all dots are glowing.) (Photo by Adam Reitzel, Woods Hole Oceanographic Institution)