What happens to a starfish to become a fossil?

Do zebra shark eat meat? How do crocodiles swim without fins? How long does it take to get a Betta fish pregnant? Does guppy have any fins? Koi Sega e nomer edno? How many eggs are in there 4 dozen? What fish cleans whales? Were Sirens considered killers? Who is bigger salt water crocodile or great white? What is the name of fish that are spikes? Do hermit crabs have a special ability? What kind of water does a bull shark drink? Do sharks have bony skeloten? How do you tell the difference between a male and female baby guppie? Do fish stay at the bottom of the tank when they are having babies? What ocean zone has the most biomass? How many pounds does a viperfish weigh? Why do wild salmon populations face the threat of extinction while pet goldfish populations are in no such danger? Where does water temperature affected marine life? How does Odysseus keep his men from eating the lotus flower?