What happens to a starfish to become a fossil?

How did the yurok catch Salmon? How many and what fishes can be kept in a 4 gallon fish bowl that already contains 1 rosy barb and 1 tiger barb? What can you do to help prevent overfishing? What is Niche for Asian carp? Can fish live in a dam? Are panga fish safe? Can a baby pleco live in the same tank as a betta? Do all sharks have a top fins? Is koi fish oviparous or viviparous? Are whale sharks eaten? How long will smoked salmon keep frozen? What is the mature size of a piranha? What kind of fish has a red head white body they are sort of like a koy but the color of white the same and the red is sort of bulging on it's head.? A website that shows solar pond pumps with over 2000 gph? How do snails make more snails? Is it true cartilaginous fish has no hinged structures that enable it to open and close its mouth? Why are koi carp so important to the Japanese Culture? Is bracing important on aquariums? How long is gestation period of freshwater stingrays? How large are apple snails?