Wurm Kavu any and all input would be appreciated

[Aqua]

Deck link: http://www.mtgvault.com/ViewDeck.aspx?DeckID=17066

i built this deck outta boredom and once it was done it looked pretty good, i wanna refine it and add it to my collection of good playable decks, try to keep in mind that i rarely play one on one matches and i usually play 5 to 6 player matches.

thanks for any help you can give