( ( ( ( ( ( Nearly ( all fish ) ) ( reproduce sexually ) ) , ) and ) ( ( most species ) ( have ( separate sexes ) ) ) ) . )
(ROOT (S (S (NP (RB Nearly) (DT all) (NN fish)) (VP (VB reproduce) (ADVP (RB sexually)))) (, ,) (CC and) (S (NP (JJS most) (NNS species)) (VP (VBP have) (NP (JJ separate) (NNS sexes)))) (. .)))
Nearly all fish reproduce sexually, and most species have separate sexes.
(ROOT (S (NP (NP (DT The) (JJ vast) (NN majority)) (PP (IN of) (NP (NN fish)))) (VP (VB reproduce) (ADVP (RB sexually))) (. .)))