( ( ( Aquatic species ) ( which ( inhabit ( murky waters ) ) ) ) ( ( have ( ( particularly bad ) eyesight ) ) . ) )
(ROOT (S (NP (NP (JJ Aquatic) (NNS species)) (SBAR (WHNP (WDT which)) (S (VP (VBP inhabit) (NP (ADJP (JJ murky)) (NNS waters)))))) (VP (VBP have) (NP (ADJP (RB particularly) (JJ bad)) (NN eyesight))) (. .)))
Aquatic species which inhabit murky waters have particularly bad eyesight.
(ROOT (S (NP (NNP Overharvesting)) (VP (VBZ is) (NP (DT a) (JJ serious) (NN threat)) (ADVP (RB particularly)) (PP (TO to) (NP (JJ aquatic) (NNS species)))) (. .)))