Place the coconut water, pineapple juice, blue curacao, and coconut rum into a cocktail mixing glass.
Stir to combine.
Serve over ice with your favorite garnishes.
Notes
Swedish Fish makes a fun addition to carrying on the "ocean" theme. Drop one or two into the glass!
This recipe was also tested with regular white rum, and it was still good. However, I suggest adding simple syrup if you use regular white rum because the coconut rum adds sweetness regular white rum does not.