There is a large population of fer de lance in Panama... I was stationed in the Canal Zone for four years and the folk lore of the fer de lance is almost as varied as the ships that transit the canal... One is of a GI who was cutting grass when he was bit and died before he reached the hospital... Its venom was at the time (mid-1960s) considered the most lethal of all... I understand that anti venoms have since been developed, reducing the death rate to near zero...