For coating #1: Prepare about 1/3 cup of breadcrumbs in another bowl.
For coating #2: Take out the chilled tuna balls from the fridge. Prepare two bowls - add 1/3 cup of breadcrumbs to one bowl, then 1 beaten egg to the other bowl. Dip each tuna balls in the beaten egg then coat with breadcrumbs. Place the coated tuna balls in a plate.
To fry: In a pan over medium heat, add oil 2 inches from the bottom. When the oil is hot enough (about 375 F), drop tuna balls. Make sure you don’t overcrowd the pan. Fry the tuna balls for 3-5 minutes or until golden brown. Place the fried tuna balls on a stack of paper towels or on a strainer to drain excess oil.