Marty’s photo of the day #4971: Look closely. The lighter-colored center of this photo is a pacific leopard flounder!

At about 15 inches full-grown, these fish can instantly change their color and pattern to match sandy or rocky seafloors and can even become nearly translucent in open water. They start life with eyes on both sides, but as they grow, the right eye migrates to the left side. Pacific leopard flounders lie partially buried in sand, using their upward-facing eyes as periscopes to hunt their prey.

(Photographed earlier this month in the Galapagos Islands.)