Flat worms

Characteristics: flat worms are invertebrates that have a bilateral symmetry. Flat worms mostly reproduce sexually, and feed on animals and other smaller life forms.
Scientific names:Platyhelminthes
- there are more than 20,000 species in the flat worm group.

Hyperlinks:
1.http://www.britannica.com/EBchecked/topic/209735/flatworm
2.http://www.animalcorner.co.uk/insects/worms/worms_flat.html