Remembering Sammy

The title of one of Sam Selvon's novels is Those Who Eat The Cascadura. The cascadura is a small ancient, reptilian looking fish which lives in swamps. It is considered to be a delicacy, and especially so when fixed as a curry. Legend or myth has it that if you eat the cascadura you will return to end your days in Trinidad. Did Sam believe in that myth? Do we sometimes foresee the future? Or, does wishing it make it come to pass?