What is the downside to doing mollys?

What type of fin is located behind the operculum on a perch fish? How do you take care of a fresh water eel? Do tiger sharks eat salmon? What is fishwick bottoms? Can you feed Oscar fish ham? Who is the actor who is cleaning fish in the Clorox commercial? How old will your grass carp have be to have babies? Process to give birth to baby? Will a yabby eat fish if they are in the same tank? Do sharks like rough or calm water better? What would win in a fight a mako shark or a great white shark? Why is cod fishing banned in 2003? Would a lion fish eat a seahorse? Where could one go to purchase a 4ft fish tank? How does the oil from the liver provide a limited buoyancy in the absence of a swim bladder? How do you look after your fish? Do great white sharks hibernate? Can you put slugs in fish tank? How long does it take to digest salmon? Does a whale shark breathe from oxygen?