1. Porpoise
   Read and learn about Porpoises..
   http: //academickids.com/encyclopedia/p/po/porpoise...
   
   
2. Seahorse
   Read and learn about Seahorse...
   http: //academickids.com/encyclopedia/index.php/Sea...
   
   
3. Echinoderm
   Echinoderm
   http: //academickids.com/encyclopedia/e/ec/echinode...
   
   
4. Sponge
   Sponge
   http: //academickids.com/encyclopedia/s/sp/sponge.h...
   
   
5. Biology 404L - Porifera
   There about 10,000 species of sponges and 98% of them are marine.
   http: //ucmp.berkeley.edu/porifera/porifera.htm...
   
   
6. Rays
   Read about stingrays.
   http: //aqua.org/animals_roughtail.html