You're attuned to the sand and the waves. If you are traveling along an ocean shoreline, you can catch enough fresh seafood to feed yourself and up to 5 other people each day, provided the ocean in that area offers such, and you have a net, fishing tackle, a sharpened stick or spear. 

In addition, thanks to your youth spent splashing in the waves, you can roll 1d4 and add the result to any Strength (Athletics) or Dexterity (Acrobatics) check that you make while at least 50% of your body is submerged in water. You can wait until after you roll the d20 before deciding to roll the d4, but must decide before the DM says whether the roll succeeds or not. You can use this feature a number of times equal to your Proficiency Bonus, and you regain all uses at the end of a long rest.