Fill your blender about ¾ full with ice (6–8 cups).

Pour in Captain Morgan spiced rum, Malibu, vodka (if using), blue curaçao, pineapple juice, and sweet & sour mix.

Blend on high until it reaches thick slushy consistency – about 30–45 seconds. If too thick, add a splash more pineapple juice. Too thin? More ice.

Pour the electric blue slush into your fishbowl or large punch bowl.

Slowly pour lemon-lime soda over the top – watch it fizz and create that cool layered ocean effect.

(Optional drama) Drizzle grenadine around the edge so it sinks like “shark blood.”

Load the rim with gummy sharks biting the glass, pineapple slices, cherries, and orange wheels.

Add crazy straws and serve immediately!