sources

Location:
http://www.sbg.ac.at/ipk/avstudio/pierofun/rovigno/rovigno3.htm
http://www.sbg.ac.at/ipk/avstudio/pierofun/rovigno/rovigno3.htm
Holt Science and technology Water on Earth 2007

General Information:
http://www.sbg.ac.at/ipk/avstudio/pierofun/rovigno/rovigno3.htm
http://www.surtsey.is/pp_ens/biosea_3.htm
http://www.nationmaster.com/encyclopedia/Sublittoral-zone
Holt Science and Technology Water on Earth 2007

Hermit Crab Information:
**www.crescenthead.ps.education.nsw.gov.au/stud...**
http://marinediscovery.arizona.edu/jenessaandjennywebpage/introduction.html
http://courses.ttu.edu/thomas/classPet/1999/HermitCrab/learn.ht

Periwinkle Information:
http://encarta.msn.com/encyclopedia_761554912/Periwinkle_(snail).html



Giant Clam Information:
www.nationalgeographic.com

Pictures:
http://images.google.com/imgres
http://www.sbg.ac.at/ipk/avstudio/pierofun/rovigno/rovigno3.htm
http://hermitcrabcare.files.wordpress.com/2007/08/hermit-crab-care.jpg