sentences:  Little is known of its life history; it is thought to be a weaker swimmer than "I. brasiliensis", and is presumably aplacental viviparous like the rest of its family.This shark is an infrequent bycatch of commercial trawl and longline fisheries, but is not thought to be much threatened by these activities.The largetooth cookiecutter shark was originally described by Jack Garrick and Stewart Springer, in a 1964 issue of the scientific journal "Copeia".