You may never have heard of the lancetfish, a sometimes 4- to 6-foot long fish with enormous teeth.

CNN: Japanese tsunami debris makes its way into Hawaiian birds

In her lab, Jantz sliced open the stomach of a lancetfish for CNN.

CNN: Japanese tsunami debris makes its way into Hawaiian birds

When she looked just at lancetfish, 45% had plastic.

CNN: Japanese tsunami debris makes its way into Hawaiian birds

But bigeye and yellow fin tuna eat lancetfish.

CNN: Japanese tsunami debris makes its way into Hawaiian birds