( Eels ( ( are ( predators ( that ( live ( ( ( in ( ( the ( shallow waters ) ) ( of ( ( ( ( the ocean ) , ) ( ( hiding ( in ( ( ( sand , ) mud ) , ) ) ) ( among rocks ) ) ) , ) ) ) ) or ) ( in ( cracks ( found ( in ( coral reefs ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Eels)) (VP (VBP are) (NP (NP (NNS predators)) (SBAR (WHNP (WDT that)) (S (VP (VBP live) (PP (PP (IN in) (NP (NP (DT the) (JJ shallow) (NNS waters)) (PP (IN of) (NP (NP (DT the) (NN ocean)) (, ,) (VP (VBG hiding) (PP (IN in) (NP (NP (NN sand)) (, ,) (NP (NN mud)) (, ,))) (PP (IN among) (NP (NNS rocks)))) (, ,))))) (CC or) (PP (IN in) (NP (NP (NNS cracks)) (VP (VBN found) (PP (IN in) (NP (NN coral) (NNS reefs)))))))))))) (. .)))
Eels are predators that live in the shallow waters of the ocean, hiding in sand, mud, among rocks, or in cracks found in coral reefs.
(ROOT (S (NP (NP (NNP Ocean) (NNP ridges)) (VP (VBN formed) (PP (IN by) (NP (NP (JJ marine) (NNS invertebrates)) (VP (VBG living) (PP (IN in) (NP (JJ warm) (JJ shallow) (NNS waters))) (PP (IN within) (NP (NP (DT the) (JJ photic) (NN zone)) (PP (IN of) (NP (DT the) (NN ocean)))))))))) (VP (VBP are) (VP (VBN called) (NP (NN coral) (NNS reefs)))) (. .)))