Weird creatures feed on plankton - Blue Planet - BBC

The global edition of BBC iPlayer has launched on iPad - http://bit.ly/qJTCsU  Download the free app today and enjoy taster clips and episodes! Watch a selection of the best classic and contemporary British shows on demand, including full length episodes of Blue Planet. In the height of the day, Petrels perform a weird and wonderful dance on the sea surface to feed on yellow-fin tuna eaggs ...