What do you call more than one discus?

What are the rings that make your fingers go green made from? What are special adaptations to help with digestion for sharks? What is the least aggressive shark? Is pacifc sanddab a carnivore omnivore or herbivore? What is the lifestyle of a seahorse? Where can one see pictures of shark teeth? Do eels go to breed at sea then come back? How do crabs breathe underwater and above water? Which fish spends four years at sea and then makes a long and exhausting upstream journey to lay its eggs in the same freshwater creek where it was hatched? What is a food web for hydrilla? What is the fish of the gcc? What family does a goldfish belong to? Why image of lion is formed in pond water? Who does the mrgupper in the song outsie from bubble guppies? Why do hermit crabs come out of their shells? Where can you buy fish-shaped practice casting plugs? Why did jennie trout become a doctor? How long does the female pregnancy of a fighting fish last? Smoked whitefish while pregnant? How many types of connectives are there?