How do you get marlin if we already have red heart?

Do you get eels in Scotland? What is the difference between a fin and flipper? Is it better to have live plants in the fish tank? Why has your tropical lochy tank fish got bubbles on its back? Are there any sharks in lake ontairio? How long does it take for aluminum cans to biodegrade in the ocean? Do clown fish and bottom feeders eat the same food? What do you call a boy mermaid? How do you get a megalodon attention? Is a moose aquatic? What would happen if Great White Sharks went extinct? Why do sharks weigh so much? What is the diet of a river ganges shark? Why are seahorse hunted? How do you fit clutch plates? Do fish bite other fish? Do clown fish bite? What to do about a smell like rotten eggs coming from the toilet? Is the water in a salt water pool harder on surrounding plants than traditional chlorine pools? Can a fish symbolize knowledge?