Happy World Oceans Day! Weve teamed up with the SpongeBob SquarePants team to delve a little deeper into the oceans and find out what plankton has done for us.\r<br>\r<br>Subscribe to BBC Earth: \r<br>BBC Earth YouTube Channel: \r<br>\r<br>BBC Earth Facebook (ex-UK only)\r<br>BBC Earth Twitter \r<br>\r<br>Visit for all the latest animal news and wildlife videos\r<br>\r<br>This is a channel from BBC Worldwide who help fund new BBC programmes.
