25 tons of sea weed is needed to produce 15kg of iodine.
Penguins can drink sea water. They have glands just above their eyes which remove salt from their blood and expel it out through their nose.
The fur of sea otters can have more than 650,000 strands of hair per square inch. It helps to keep them insulated while swimming in cold waters.
The Pacific Ocean is the biggest ocean in the world, accounting for 32% of the world's total surface area. That's slightly more than all the land in the world combined.
The densest planet in our solar system is our own Earth. The least dense is Saturn. If all the planets were placed in a massive ocean, only Saturn would float.
Marlin fish found in the Atlantic ocean are big and fast. They weigh up 1,400lbs (630kg) and can swim 50 miles per hour (80km/h). Their pointy spear helps them hunt tuna and mackerel.
The ocean sunfish can lay up to 300 million eggs at a time. Being the heaviest bony fish in the world, their weight may reach 2,200lbs (1,000kg).
The biggest garbage patch in the world is found in the Pacific Ocean. It's made up of tiny plastic particles which can't be seen, but pose danger to all marine life. By preventing reflecting sunlight the plastic starves the algae and plankton living below.