I'm a partner in <a href=" http://www.valleyseakayaks.com/cheap-lexapro-no-prescription.pdf ">cheap lexapro no prescription</a> Although blue whales are the largest animal to ever live on Earth, they are filter-feeders, dining almost exclusively on swarms of krill (euphausiids) – tiny marine crustaceans that look like shrimps and are roughly the size of a jelly bean. A blue whale captures swarms of krill by engulfing a swimming pool-sized gulp of water in its mouth. The whale then squeezes the water out of its mouth using its powerful tongue. Curtains of baleen sheets (consisting of keratin, just like human fingernails) on the upper jaw act as sieves to prevent krill from escaping so the whale can swallow them.