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"