( ( ( ( ( ( Once ( ( the eggs ) ( are ( fertilized ( ( most seastar ) larva ) ) ) ) ) ( have ( planktonic stages ) ) ) , ) but ) ( ( some species ) ( do ( brood ( their young ) ) ) ) ) . )
(ROOT (S (S (SBAR (IN Once) (S (NP (DT the) (NNS eggs)) (VP (VBP are) (VP (VBN fertilized) (NP (ADJP (RBS most) (JJ seastar)) (NN larva)))))) (VP (VBP have) (NP (JJ planktonic) (NNS stages)))) (, ,) (CC but) (S (NP (DT some) (NNS species)) (VP (VBP do) (S (VP (VBG brood) (NP (PRP$ their) (JJ young)))))) (. .)))
Once the eggs are fertilized most seastar larva have planktonic stages, but some species do brood their young.
(ROOT (S (S (NP (NP (DT Some) (NN species)) (PP (IN of) (NP (NN fish)))) (VP (VBP carry) (NP (PRP$ their) (VBN fertilized) (NNS eggs)) (PP (IN in) (NP (PRP$ their) (NN mouth))) (SBAR (IN until) (S (NP (PRP they)) (VP (VBP hatch)))))) (: ;) (S (NP (DT this)) (VP (VBZ is) (VP (VBN called) (S (ADJP (NN mouth) (JJ brooding)))))) (. .)))