( ( The ( neritic zone ) ) ( ( ( extends ( below ( the intertidal ) ) ) ( to ( ( the edge ) ( of ( ( the ( continental shelves ) ) ( -LRB- ( ( ( ( approximately ( ( ( 200 m ) or ) 660 ) ) ft ) deep ) -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ neritic) (NN zone)) (VP (VBZ extends) (PP (IN below) (NP (DT the) (NN intertidal))) (PP (TO to) (NP (NP (DT the) (NN edge)) (PP (IN of) (NP (NP (DT the) (JJ continental) (NNS shelves)) (PRN (-LRB- -LRB-) (ADJP (NP (QP (RB approximately) (CD 200) (CD m) (CC or) (CD 660)) (NN ft)) (JJ deep)) (-RRB- -RRB-))))))) (. .)))
The neritic zone extends below the intertidal to the edge of the continental shelves (approximately 200 m or 660 ft deep).
(ROOT (S (NP (DT The) (JJ photic) (NN zone)) (VP (VBZ extends) (ADJP (NP (CD 200) (NNS meters)) (JJ deep))) (. .)))
The photic zone extends 200 meters deep.