Prehistoric Shark Crossword Puzzle

QUESTIONS LIST: megalodon : _ was the most massive shark that ever lived, whale shark : the filter-feeding _ _ is the biggest fish species alive today, great white : the _ _ shark grows to only about 20 feet long, lamniform : there are 13 species of _ sharks alive today, fossils : most megalodon _ date to around 15 million years ago, cartilage : shark skeletons are made of _ rather than bone, tooth : _ size can be used to estimate a shark's body size, cannibalistic : their gigantism may be fueled by a reproductive strategy, gigantism : researchers found that _ was common in multiple lamniform lineages, extinct : "why megalodon became _ is another big fundamental question that remains unsettled"