 The tiger shark ("Galeocerdo cuvier") is known to prey on "Rhina ancylostoma".The ray is protected by the thorns on its head and back, and it may ram perceived threats.Parasites documented from this species include the tapeworms "Carpobothrium rhinei", "Dollfusiella michiae", "Nybelinia southwelli", "Stoibocephalum arafurense", and "Tylocephalum carnpanulatum", the leech "Pontobdella macrothela", the trematode "Melogonimus rhodanometra", the monogeneans "Branchotenthes robinoverstreeti" and "Monocotyle ancylostomae", and the copepods "Nesippus vespa", "Pandarus cranchii", and "P. smithii".