( ( ( The ( sunlit zone ) ) ( of ( the ocean ) ) ) ( ( is ( called ( ( the ( photic zone ) ) ( -LRB- ( or ( ( euphotic zone ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ sunlit) (NN zone)) (PP (IN of) (NP (DT the) (NN ocean)))) (VP (VBZ is) (VP (VBN called) (NP (NP (DT the) (JJ photic) (NN zone)) (PRN (-LRB- -LRB-) (CC or) (ADJP (JJ euphotic) (JJ zone)) (-RRB- -RRB-))))) (. .)))
The sunlit zone of the ocean is called the photic zone (or euphotic zone).
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (JJ lightless) (NN part)) (PP (IN of) (NP (DT the) (NN ocean) (JJ aphotic) (NN zone))))) (. .)))