( ( ( ( ( Benthos Collectively ) , ) ( those ( ( plants and ) animals ) ) ) , ) ( usually ( ( ( invertebrates , ) ( living ( ( ( on or ) near ) ( ( the bottom ) ( of ( ( the ( ( bay or ) ocean ) ) ( -LRB- ( ( ( benthic , ) adj. ) -RRB- ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (NNP Benthos) (NNP Collectively)) (, ,) (NP (DT those) (NNS plants) (CC and) (NNS animals)) (, ,)) (ADVP (RB usually)) (VP (VBD invertebrates) (, ,) (S (VP (VBG living) (PP (IN on) (CC or) (IN near) (NP (NP (DT the) (NN bottom)) (PP (IN of) (NP (NP (DT the) (NN bay) (CC or) (NN ocean)) (PRN (-LRB- -LRB-) (NP (NN benthic)) (, ,) (NP (NNP adj.)) (-RRB- -RRB-))))))))) (. .)))
Benthos Collectively, those plants and animals, usually invertebrates, living on or near the bottom of the bay or ocean (benthic, adj.).
(ROOT (S (NP (NP (VBG Living) (NNS things)) (PP (IN on) (NP (DT the) (NN ocean) (NN floor)))) (VP (VBP are) (VP (VBN known) (PP (IN as) (NP (NNS benthos))))) (. .)))
Living things on the ocean floor are known as benthos.