Subphylum Hemichordata

Characteristics of Hemichordata:-
Bilaterally symmetrical.
Body has more than two cell layers, tissues and organs.
Body cavity a true coelom.
Body possesses a through gut, straight or U-shaped, with an anus.
Body divided into three sections, a proboscis, a collar and a trunk.
Nervous system normally diffuse, but variable.
Has a partially open circulatory system.
Possesses glomerulus as an excretory organ.
Reproduction normally sexual and gonochoristic.
Feeds on fine particles in the water.
All live marine environments.

More Information on hemichordates is here.