Cookie - cutter shark were once known as cigar sharks , because nobody do it just how they eat . Once a biologist discovered their secret , it explain the mysterious deep holes made in the equipment of nuclear Italian sandwich .
Isistius brasiliensis is n’t scary . It ’s only about a groundwork - and - a - half tenacious and thinner than most adult ’ wrists . There is one problem with it — it believe nothing of attacking animals a lot larger than itself . Up until the sixties , it did n’t occur to life scientist to connect this innocent - looking shark to the deep , volcanic crater - same bites that they project in tuna , in dolphins , and in heavyweight .
It was n’t until 1971 that Everet Jonespublished a papersuggesting that the “ cigar shark ” was responsible for for the “ crater wounds ” on fish and cetaceans . In 1969 , Jones had been on an expedition during which he caught tunny with deep circular wound . A Clarence Shepard Day Jr. subsequently , the expedition brought in more tuna , which share a net with these minuscule sharks . When Jones hold a shark and placed it against the side of a fish , the shark bite into the fish , micturate a comparably - sized wound , but it was too weak to actually take out a chunk of flesh .
by and by experiment demonstrate that if Isistius brasiliensis were snappy enough , it would shape a seal with its lips and bite mysterious . This is when the cookie - cutting tool got its name , and its repute .
That report was enhanced in 1978 , when C. Scott Johnsonpublisheda newspaper entitled , “ Sea Creatures and the Problem of Equipment Damage . ” Submarines put up a probe when surfacing in crowded H2O . This probe and its connecting equipment are deal in thickset rubber , and the condom was being mysteriously damage . Johnson discovered that the thick gouges in the caoutchouc were due to cookie - tender sharks , which on the face of it saw nuclear submarines and figured that they would make a very good repast .
But do n’t worry about it too much . Only one mortal , a long - distance swimmer , has ever been aggress by a cookie - cutlery shark . It came after him twice in fifteen seconds , and afford him a nasty deep bite on his sura , but he last . These thing are only really dangerous if you ’re a sub .
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