Scientific method is your answer to your question
Answer:
add iodine solution and look for a color change. If starch is present the color change should be blue/black
Right there are 440 known species of sharks around the world right now discovered by humans so far there are more sharks around the world that we hadn't discovered yet. Here are some sharks: Hammerhead Sharks, Sand Sharks,Saw Sharks, Carpet Sharks and much more.