Is a dogfish egg-case man made?

Do American eels bite? What to do if you spot a shark? What does the term green around the gills mean? What do fish have and people don't? The type of friction that exists for a shark swimming in the ocean is? Is the frilled shark dangerous? Can you put Legos in a fish Aquarium? Are rays classified as fish? What are some issues for marine life? What sea animal eats whales? What is a large edible fish a flounder called? How are Dorothy and her friends able to get past the hammer heads? What is the most dangerous aquarium fish? How do you eat a star fish? Do salmon have back bones? Can you breed two guppie siblings together or will the fry end up deformed? Is a whale shark a hybrid? What bony landmark can help you locate the brachialis? Flight time la to london? What is the definition of legal seafood?