What does it mean if goldfish constantly swim?

Do ling cod have skin like a shark or catfish or do they have scales? What is the queen triggerfish predators? Do seagulls eat big fish? What are the name of fish in Bicol? Which is more likely to cause damage to a wooden floor a basketball player in athletic shoes or a sports reporter stainding in high heels? Can a dragon fish be in the same tank with a black tip shark? Which fish live in lakes? Is a cheetah faster than a swordfish? How many kinds of different fish are there in the sea of galilee? What are the differences between pacu and piranha fish? Why does my pleco keep floating? How much would a 200 gallon fish tank weigh empty? Who invented the first shark? Can sharks catch HIV? Which is an invertebrate lancelet lamprey shark or platypus? Does seahorses have fins? What does it mean if you dream about sharks surrounding you but not attacking? What is the size of the biggest pirahna? How much do black angus cattle sell for? What is another name for fishbowl?