hi michel thank you so much .just now i searched in the google images with your clue.i got the answer.it is magnolia acuminata cucumber magnoia fruit see this link.. http://www.greenmanradio.com/images/collage/Magnolia acuminata Cucumber Magnoia fruit.jpg
Leaves etc. as far as can be seen in your picture are not those of that species. This hardy, deciduous eastern North American species might also not be expected to be seen in the Bahamas - if that is where you took your photo.
