▁and ▁ ▁west ▁of ▁the ▁Fernando ▁de ▁Nor on ha ▁arch ip el ago . ▁The ▁at oll ▁is ▁of ▁vol can ic ▁origin ▁and ▁cor all ine ▁formation . ▁ ▁Description ▁ ▁The ▁o val ▁at oll ▁is ▁ ▁long ▁and ▁ ▁wide . ▁The ▁l ago on ▁is ▁up ▁to ▁ ▁deep ▁and ▁has ▁an ▁area ▁of ▁. ▁The ▁land ▁area ▁of ▁the ▁two ▁is lets ▁( C em ité rio ▁Island , ▁south west ▁and ▁Far ol ▁C ay , ▁north west ) ▁is ▁. ▁Far ol ▁C ay ▁accounts ▁for ▁almost ▁two - third s ▁of ▁the ▁aggregate ▁area . ▁The ▁highest ▁point ▁is ▁a ▁sand ▁d une ▁in ▁the ▁south ▁of ▁larger ▁Far ol ▁C ay , ▁with ▁a ▁height ▁of ▁. ▁Both ▁is lets ▁are ▁over g rown ▁with ▁grass es , ▁bush es ▁and ▁a ▁few ▁pal m ▁trees . ▁The ▁population ▁consists ▁of ▁c rab s , ▁sp iders , ▁sc orp ions , ▁sand ▁fle as , ▁be et les , ▁large ▁ro aches , ▁and ▁many ▁species ▁of ▁birds . ▁ ▁There ▁is ▁a ▁l ighth ouse ▁of ▁the ▁Brazil ian ▁Navy ▁that ▁has ▁been ▁in ▁operation ▁and ▁maintained ▁since ▁the ▁ 1 9 6 0 s , ▁at ▁the ▁Northern ▁end ▁of ▁Far ol ▁Bay . ▁In ▁its ▁vic inity ▁is ▁a ▁der el ict ▁l ighth ouse ▁from ▁ 1 9 3 3 . ▁ ▁The ▁at oll ▁is ▁a ▁wild life ▁san ctu ary , ▁and ▁in ▁ 2 0