1 5 , ▁with ▁additional ▁research ▁still ▁under going ▁review ▁at ▁the ▁time ▁of ▁her ▁death . ▁ ▁Leg acy ▁ ▁Clark ▁author ed ▁two ▁books , ▁Lady ▁with ▁a ▁Spe ar ▁( 1 9 5 3 ) ▁and ▁The ▁Lady ▁and ▁the ▁Sh arks ▁( 1 9 6 9 ), ▁as ▁well ▁as ▁over ▁ 1 7 5 ▁scientific ▁articles . ▁Clark ▁was ▁an ▁av id ▁supp orter ▁of ▁marine ▁conservation ▁and ▁many ▁of ▁her ▁popular ▁publications ▁and ▁public ▁appearances ▁focused ▁on ▁disp elling ▁assumptions ▁about ▁sh ark ▁behavior ▁and ▁intelligence ▁in ▁an ▁effort ▁to ▁prevent ▁the ▁killing ▁of ▁sh arks ▁and ▁encou rage ▁the ▁pres ervation ▁of ▁marine ▁environments . ▁Publications ▁from ▁within ▁this ▁body ▁of ▁work ▁document ▁that ▁she ▁was ▁the ▁first ▁person ▁to ▁train ▁sh arks ▁to ▁press ▁targets , ▁as ▁well ▁as ▁the ▁first ▁scient ist ▁to ▁develop ▁“ test ▁t ube ” ▁b ab ies ▁in ▁female ▁fish . ▁She ▁also ▁discovered ▁that ▁the ▁Mos es ▁sole ▁produces ▁a ▁natural ▁sh ark ▁rep ell ent , ▁which ▁has ▁since ▁been ▁employed ▁by ▁research ers ▁aim ing ▁to ▁prevent ▁harm ful ▁interactions ▁between ▁sh arks ▁and ▁humans . ▁Clark ' s ▁observation ▁of ▁numerous ▁“ sleep ing ” ▁sh arks ▁during ▁her ▁research ▁div es ▁helped ▁to ▁prove ▁sh arks ▁do ▁not ▁need ▁to ▁move ▁in ▁order ▁to ▁bre at he . ▁Over ▁her ▁dec ades ▁of ▁research , ▁Clark ▁conducted ▁over ▁ 7 0 ▁subm ers ible ▁div es ▁and ▁led ▁more ▁than ▁ 2 0 0