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.
Essential fatty acids are called 'essential' because our bodies need them on a regular basis. They are found in foods rich in Omega-3 and Omega-6, including fish, flax seeds, nuts, pumpkin seeds, sunflower seeds and leafy vegetables.