This is not news to anyone here, but evidently it is if you do research for Univ. Delaware,Ocean Research ,Remote Sensing BIOGEOGRAPHY labs,
Tracking .what they call "Tiger Sharks" ....SAND TIGERS, anyway here's the pic & link to the Sand tiger that took the bait....
www.nbcnews.com/science/shark-swallowed ... 6C10945724
Point Blank. Medium size to Big Baits Work probably even fished as live bait.
Its common for sharks to eat other sharks whole or in pieces,,,,CHOMP ,CHOMP 
its in there nature.
SOUTH FLORIDA SHARK CLUB -President SFSC-Founding Member est 1983 SFSC-Website Administrator BIG HAMMER SHARK TOURNAMENT -Founder Rene Memorial Sharkathon -Founder NMFS Shark Tagger
Its common for sharks to eat other sharks whole or in pieces,,,,CHOMP ,CHOMP
HI Will How are you Man?
Yes i figured everybody here has probably seen this alot and know it from just common shark fishing knowledge ,but I guess it's "news" to 'researchers,and the general news watching public! LOL
You know we had all different sizes of aquariumtanks over the years , as Kids and after growing up [supposedly] my Friends & I ,
And it didn't matter what size tank....from 10 gallon , to 250 Gallon and bigger, if the fish in it could chase, catch , and swallow ,other fish in the tank; THEY WOULD , and FAST TOO! LOL
even some frogs we got years ago the lady in the store said : " OH Don't worry, they are compatable."
They were "compatable" allright; untill I finally caught a frog in the act of zooming up off the bottom ,grabbing a fish,I wasn't sure what was happening to them
YES it's definitely IN thier Nature LOL
I like it when Big Jacks eat baby jacks. 
Even Bass eat baby bass 
I like it when Big Jacks eat baby jacks.
Even Bass eat baby bass
Meant to put this in the last post......when we had those aquarium tanks, one of my buds set up a fresh water "Lake" tank , had duckweed and others , in spring he had little Sunnies, bluegills, punkinseeds, and a TINY Pickerel, about 2-1/2" long! that little tiny pickerel used to hide in the duckweed and ambush everything he could! LOL it was so funny
Serious tho , I had this REBEL "Shallow R" crankbait, photo finished BABY BASS, the big Bass used to slam it
and JACKS? wow, I use those "RAT-L-Traps " and they kill'em even the "bublegumpink" job ,
But you and JD got THE biggest jacks I EVER saw ,I didn't think they even got THAT big!!
The biggest ones I caught were out of a canal in Cape coral when they ran thru in a school , on a Bomber Minno,tiger stripe goldmirror color,a little over 25" [got 24" marked off on net handle]
,